I keep getting an fpermissive error in my code where i call the functions im not sure why. the two errors are:
error: invalid conversion from ‘char*’ to ‘char’ [-fpermissive]
132 | playGame(winnerWord, wordArray);
error: invalid conversion from ‘char’ to ‘char*’ [-fpermissive]
90 | buildResult(guess, winWord);
Im pretty new to C++ so im not sure what to do, any help is greatly appreciated.
void playGame(char winWord, string arr[2315]) {
string guessWord;
cout << "Ok. I am thinking of a word with 5 letters." << endl;
cout << "What word would you like to guess?" << endl;
getline(cin, guessWord);
while (verifyExists(guessWord, arr) == 2)
{
cout << "The word: " << guessWord << " is not in the word list" << endl;
getline(cin, guessWord);
}
while (verifyExists(guessWord, arr) == 3)
{
cout << "You must enter a word that is 5 letters in length: " << endl;
getline(cin, guessWord);
}
cout << guessWord << endl;
char guess[5];
for (int i = 0; i < 5; i++)
{
guess[i] = guessWord[i];
}
buildResult(guess, winWord);
}
int main() {
string wordArray[2315];
ifstream myfile ("proj1_data.txt");
cout << " Welcome to UMBC Wordle" << endl;
if (myfile.is_open())
{
string word;
int loop = 0;
while (getline(myfile, word))
{
wordArray[loop++] = word;
}
cout << " " << endl;
cout << " Your file was imported!" << endl;
cout << " 2315 Words imported" << endl;
cout << " " << endl;
myfile.close();
}
srand(time(0));
string chosenWord = wordArray[rand() % 2315];
char winnerWord[5];
for (int i = 0; i < 5; i++)
{
winnerWord[i] = chosenWord[i];
}
playGame(winnerWord, wordArray);
return 0;
}
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I get an error saying "'find' in ‘sentence’, which is of non-class type ‘char*’".
So the instruction was to enter a string and identify which in the string is a noun, pronoun, adjectives and a linking verb. Everything seems to work except the ".find" part. I really need help.
(btw, nvm the other unecessary things. I made the code shorter to put focus more on the problem)
#include <iostream>
#include <cstring>
#include <cctype>
#include <string>
using namespace std;
string student_id, first_name, last_name, middle_name, suffix;
char sentence[100][100];
char history1[100][100];
int h = 0, s= 0;
char noun[20][20] = {"Ervin", "Rafi", "Peco", "luis", "Edgar", "Benj", "Rias", "Aki", "Naruto", "Jhay", "Josh", "Jopay", "Sasuke", "Joshua", "Trump", "Benjo", "Alice", "Janelle", "Samantha", "Jairah"};
char pronoun[20][20] = {"he", "she", "i", "it", "you"};
char verb[20][20] = {"is", "was", "are", "as", "am"};
char adj[20][20] = {"big", "small", "racist", "fat", "Funny", "gay", "black", "white", "rainbow", "tiny", "smart", "bi", "pan", "stupid", "idiot", "buang", "retard", "gaymer", "special", "talented"};
void display_dictionary();
void open_checker();
bool hasElement(char sentence[], char elements[], int size);
int main()
{
int option;
cout << endl << "Account Menu" <<endl;
cout << "[1] Open checker" << endl;
cout << "[2] Display Dictionary" << endl;
cout << "Option: ";
cin >> option;
switch (option){
case 1: open_checker(); break;
case 2: display_dictionary(); break;
}
return 0;
}
void display_dictionary(){
cout << "List of Nouns: ( ";
for (int n = 0; n < 20; n++){
cout << noun[n] << " " ;
}
cout << ")" << endl << endl;
cout << "List of Pronouns: ( ";
for (int n = 0; n < 5; n++){
cout << pronoun[n] << " " ;
}
cout << ")" << endl << endl;
cout << "List of Linking Verbs: ( ";
for (int n = 0; n < 5; n++){
cout << verb[n] << " " ;
}
cout << ")" << endl << endl;
cout << "List of Adjectives: ( ";
for (int n = 0; n < 20; n++){
cout << adj[n] << " " ;
}
cout << ")" << endl << endl;
}
void open_checker(){
int option;
cout << "Enter Sentence: ";
cin.ignore();
cin.get(sentence[s], 100);
if (hasElement(sentence[s], noun[s], 20)){
cout << " Is a noun." << endl;
}
if (hasElement(sentence[s], adj[s], 20)){
cout << " Is an Adjectives." << endl;
}
if (hasElement(sentence[s], verb[s], 5)){
cout << " Is a Linking Verb." << endl;
}
if (hasElement(sentence[s], pronoun[s], 5)) {
cout << " Is a Linking Verb." << endl;
}
else {
cout << "Sentence does not have all required elements." << endl;
}
strcpy(history1[h], sentence[s]);
history1[h][h] = sentence[s][s];
h++;
s++;
cout << "Type 1 to go back: ";
cin >> option;
if (option == 1){
main();
}
}
bool hasElement(char sentence[], char elements[], int size){
for (int i = 0; i < size; i++) {
if (sentence.find(elements[i]) != string::npos) {
cout << elements[i];
return true;
}
}
return false;
}```
This is my first semester of computer science, and I need help with my first project. So far, it's still a mess, and I am mainly doing test cases to ensure basic things like my functions work.
The goal of the project is to ask the user how many robots they want to make, name them, then they can use the robot's name (their unique identifier) to move the robots along an X-Y axis, which is really just the program adding or subtracting to a .Xvalue or .Yvalue.
My MenuFunction works, but I am having trouble with the MoveFunction. Basically, I want the MoveFunction to ask the user which robot they want to use, go through the RobotArray, and print the Robot's name once found.
Again, this is just a test case so I can better understand the coding. Right now, I am getting two errors:
main.cpp:42:33: error: expected primary-expression before ‘]’ token
42 | string MoveFunction(RobotArray[], robotName, NumberOfRobots);
main.cpp:62:16: error: no match for call to ‘(std::string {aka std::__cxx11::basic_string}) ()’
62 | MoveFunction();
I don't know what to do for the first error, but I think the latter is due to my not having any objects in the function call, but I wouldn't know what to put in there anyway.
My complete code is below:
#include <iostream>
using namespace std;
struct userRobot
{
string name;
int Xvalue = 0;
int Yvalue = 0;
};
void MenuFunction()
{
cout << "Welcome to MultiRobo Guider." << endl;
cout << "Please select:" << endl;
cout << "m - move" << endl << "d - distance" << endl << "q - quit" << endl << endl;
}
int main()
{
int NumberOfRobots;
string robotName;
cout << "Enter the number of robots" << endl;
cin >> NumberOfRobots;
cout << endl << "Enter their name(s)" << endl;
userRobot RobotArray[NumberOfRobots];
for (int i = 0; i < NumberOfRobots; i++)
{
cin >> robotName;
RobotArray[i].name = robotName;
}
cout << endl;
for (int j = 0; j < NumberOfRobots; j++)
{
cout << RobotArray[j].name << "'s position is ";
cout << "(" << RobotArray[j].Xvalue << "," << RobotArray[j].Yvalue << ")" << endl << endl;
}
string MoveFunction(RobotArray[], robotName, NumberOfRobots);
{
cin >> robotName;
for (int k = 0; k < NumberOfRobots; k++)
{
if (robotName == RobotArray[k].name)
{
cout << RobotArray[k].name;
}
}
}
MenuFunction();
char input;
cin >> input;
if (input == 'm')
{
cout << "Which robot would you like to move?";
MoveFunction();
}
else if (input == 'd')
{
cout << "distance";
}
else if (input == 'q')
{
cout << "quit";
}
}
First off, userRobot RobotArray[NumberOfRobots]; is a variable-length array, which is a non-standard extension supported by only a few compilers. To create an array whose size is not known until runtime, you should use new[] instead, or better std::vector.
That said, your main issue is that you are trying to define your MoveFunction() function inside of your main() function, which is not allowed. But, even if it were, you are not declaring it correctly. It has an erroneous ; on it. And RobotArray, robotName, and NumberOfRobots are not types, but variables. Like a variable, a function parameter always starts with a type. There are no untyped parameters/variables in C++.
You need to either:
move MoveFunction() outside of main(), and fix its declaration to use proper types, eg:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
struct userRobot
{
string name;
int Xvalue = 0;
int Yvalue = 0;
};
void MenuFunction()
{
cout << "Welcome to MultiRobo Guider." << endl;
cout << "Please select:" << endl;
cout << "m - move" << endl << "d - distance" << endl << "q - quit" << endl << endl;
}
void MoveFunction(userRobot RobotArray[], int NumberOfRobots)
{
cout << "Which robot would you like to move?";
string robotName;
cin >> robotName;
for (int k = 0; k < NumberOfRobots; k++)
{
if (robotName == RobotArray[k].name)
{
cout << RobotArray[k].name << endl;
return;
}
}
cout "Robot not found" << endl;
}
int main()
{
cout << "Enter the number of robots" << endl;
int NumberOfRobots;
cin >> NumberOfRobots;
vector<userRobot> RobotArray(NumberOfRobots);
cout << endl << "Enter their name(s)" << endl;
for (int i = 0; i < NumberOfRobots; i++)
{
cin >> RobotArray[i].name;
}
cout << endl;
for (int j = 0; j < NumberOfRobots; j++)
{
cout << RobotArray[j].name << "'s position is ";
cout << "(" << RobotArray[j].Xvalue << "," << RobotArray[j].Yvalue << ")" << endl << endl;
}
MenuFunction();
char input;
cin >> input;
if (input == 'm')
{
MoveFunction(RobotArray.data(), NumberOfRobots);
}
else if (input == 'd')
{
cout << "distance";
}
else if (input == 'q')
{
cout << "quit";
}
}
or change MoveFunction() into a lambda, eg:
#include <iostream>
#include <vector>
#include <string>
using namespace std;
struct userRobot
{
string name;
int Xvalue = 0;
int Yvalue = 0;
};
void MenuFunction()
{
cout << "Welcome to MultiRobo Guider." << endl;
cout << "Please select:" << endl;
cout << "m - move" << endl << "d - distance" << endl << "q - quit" << endl << endl;
}
int main()
{
cout << "Enter the number of robots" << endl;
int NumberOfRobots;
cin >> NumberOfRobots;
vector<userRobot> RobotArray(NumberOfRobots);
cout << endl << "Enter their name(s)" << endl;
for (int i = 0; i < NumberOfRobots; i++)
{
cin >> RobotArray[i].name;
}
cout << endl;
for (int j = 0; j < NumberOfRobots; j++)
{
cout << RobotArray[j].name << "'s position is ";
cout << "(" << RobotArray[j].Xvalue << "," << RobotArray[j].Yvalue << ")" << endl << endl;
}
auto MoveFunction = [&]{
cout << "Which robot would you like to move?";
string robotName;
cin >> robotName;
for (int k = 0; k < NumberOfRobots; k++)
{
if (robotName == RobotArray[k].name)
{
cout << RobotArray[k].name << endl;
return;
}
}
cout "Robot not found" << endl;
};
MenuFunction();
char input;
cin >> input;
if (input == 'm')
{
MoveFunction();
}
else if (input == 'd')
{
cout << "distance";
}
else if (input == 'q')
{
cout << "quit";
}
}
You have a semi-colon at the end of MoveFunction() definition, In C++ when you define a function the name of the function does not end with a semi-colon.
Im writing a wordle game and am trying to get the output to work, but i have no clue as to what im doing wrong here. The basic version of the code is 5 letter words are taken from a word file and stored in an array, then a random word is picked from there to be the answer to the wordle. Then the user is prompted for input and once they input a word, it verifies the length, as well as if it is in the array of words. then another function takes the guessed word and compares it against the winning word and outputs the guessed word with colors to show what letters are in the right spot, like real wordle. The issue arises when i try to print everything out, i tried to use a while loop to ask for input but i couldnt get it to work so i decided to test it by making a function that asks for the input, then i called it six times, each time giving it a different variable to store the result in, then print out the first one on the first guess, the first and second on the second guess, and so on. But it only prints out the current guess. It might be something very obvious but i have spent so much time coding i have no idea. any help is greatly appreciated.
#include <iostream>
#include <string>
#include <fstream>
#include <ctime>
using namespace std;
const string CORRECT = "\033[7;32m";
const string CLOSE = "\033[7;33m";
const string INCORRECT = "\033[7;37m";
const string END = "\033[0m";
int verifyExists(string word, string verifyArr[2315]) {
if (word.size() == 5)
{
for (int i = 0; i < 2315; i++)
{
if (word == verifyArr[i])
{
return 1;
}
}
return 2;
} else {
return 3;
}
}
string buildResult(string plyrGuess, string word)
{
string result[5];
string color;
for (int i = 0; i < 5; i++){
if (plyrGuess[i] != word[i])
{
color = INCORRECT + plyrGuess[i] + END;
result[i] = color;
}
if ((plyrGuess[i] != word[i]) && (plyrGuess[i] == word[0] || plyrGuess[i] == word[1] || plyrGuess[i] == w\
ord[2] || plyrGuess[i] == word[3] || plyrGuess[i] == word[4]))
{
color = CLOSE + plyrGuess[i] + END;
result[i] = color;
}
if (plyrGuess[i] == word[i])
{
color = CORRECT + plyrGuess[i] + END;
result[i] = color;
}
}
string done;
for (int i = 0; i < 5; i++)
{
cout << result[i];
}
getline(cin, done);
return done;
}
string askInput(string array[2315])
{
string guessWord;
cout << "What word would you like to guess?" << endl;
getline(cin, guessWord);
while (verifyExists(guessWord, array) == 2)
{
cout << "The word: " << guessWord << " is not in the word list" << endl;
getline(cin, guessWord);
}
while (verifyExists(guessWord, array) == 3)
{
cout << "You must enter a word that is 5 letters in length: " << endl;
getline(cin, guessWord);
}
return guessWord;
}
void playGame(string winWord, string arr[2315]) {
cout << "Ok. I am thinking of a word with 5 letters." << endl;
string guess1 = askInput(arr);
string done1 = buildResult(guess1, winWord);
cout << done1 << "\n" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
string guess2 = askInput(arr);
string done2 = buildResult(guess2, winWord);
cout << done1 << endl;
cout << done2 << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
string guess3 = askInput(arr);
string done3 = buildResult(guess3, winWord);
cout << done1 << endl;
cout << done2 << endl;
cout << done3 << endl;
cout << "_____" << endl;
cout << "_____" << endl;
cout << "_____" << endl;
string guess4 = askInput(arr);
string done4 = buildResult(guess4, winWord);
cout << done1 << endl;
cout << done2 << endl;
cout << done3 << endl;
cout << done4 << endl;
cout << "_____" << endl;
cout << "_____" << endl;
string guess5 = askInput(arr);
string done5 = buildResult(guess5, winWord);
cout << done1 << endl;
cout << done2 << endl;
cout << done3 << endl;
cout << done4 << endl;
cout << "_____" << endl;
string guess6 = askInput(arr);
string done6 = buildResult(guess6, winWord);
cout << done1 << endl;
cout << done2 << endl;
cout << done3 << endl;
cout << done4 << endl;
cout << done5 << endl;
cout << done6 << endl;
}
int main() {
string wordArray[2315];
ifstream myfile ("proj1_data.txt");
cout << " Welcome to UMBC Wordle" << endl;
if (myfile.is_open())
{
string word;
int loop = 0;
while (getline(myfile, word))
{
wordArray[loop++] = word;
}
cout << " " << endl;
cout << " Your file was imported!" << endl;
cout << " 2315 Words imported" << endl;
cout << " " << endl;
myfile.close();
}
srand(time(0));
string chosenWord = wordArray[rand() % 2315];
playGame(chosenWord, wordArray);
return 0;
}
I dont get any errors when i compile it so i know that nothings "wrong" with the code, the problem is in the playGame function, i included the whole code in case that helps
The goal of this assignment for my class is to ask the user for how many students are in the class.
Using the Vector library create a vector of Strings to hold the students names.
Create a vector of type double to hold a students grade average.
I have a couple two compiler errors that are preventing my code from running. Line 73 & 83. The following errors I am given:
main.cpp: In function ‘void add_student()’: main.cpp:73:11: error: request for member ‘push_back’ in ‘grade’, which is of non-class type ‘double’
73 | grade.push_back(grade);
| ^~~~~~~~~
main.cpp: In function ‘void remove_student()’: main.cpp:83:23: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<std::__cxx11::basic_string<char> >::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
83 | for (int i = 0; i < students.size(); i++)
| ~~^~~~~~~~~~~~~~~~~**
Any help would be much appreciated. Below is my entire code
#include <iostream>
#include <string>
#include <vector>
#include <iomanip>
using namespace std;
vector<string> students;
vector<double> grade;
void add_student();
void remove_student();
void menu();
void print_summary();
int main()
{
int numStudent;
char menuSelection;
cout << "Welcome to the Student roaster!" << endl;
cout << "How many students are in your class?:" << endl;
cin >> numStudent;
for (int i = 0; i < numStudent; i++)
{
add_student();
}
cout << "Thank you for entering class information!" << endl;
//calls menu for the user
menu();
while (1)
{
cout << "selection:" << endl;
cin >> menuSelection;
if (menuSelection == 'a')
{
add_student();
}
else if (menuSelection == 'r')
{
remove_student();
}
else if (menuSelection == 'p')
{
print_summary();
}
else if (menuSelection == 'm')
{
menu();
}
else if (menuSelection == 'q')
break;
else
cout << "Not a valid selection" << endl;
}
return 0;
}
void add_student()
{
string firstName, lastName;
double grade;
//ask for student info
cout << "Please enter student (Fisrt Last Grade) info: " << endl;
cin >> firstName >> lastName >> grade;
firstName += " ";
firstName += lastName;
//inserts new student
students.push_back(firstName);
grade.push_back(grade);
}
void remove_student()
{
string first, last;
cout << "Enter the student (First Last) to remove :\n";
cin >> first >> last;
first += " ";
first += last;
int loc = 0;
for (int i = 0; i < students.size(); i++)
{
if (students[i] == first)
{ // finding the location to erase
loc = i;
break;
}
}
students.erase(students.begin() + loc); //removing using erase function
grade.erase(grade.begin() + loc);
}
void menu()
{
cout << "Please choose one of the following options:\n";
cout << "a: add a student\n";
cout << "r: remove a student\n";
cout << "p: print the class summary\n";
cout << "m: print menu\n";
cout << "q: quit program\n";
}
void print_summary()
{
cout << "class summary" << endl;
cout << "--------------------------------" << endl;
cout << "Name" << setw(20) << "Grade" << endl;
cout << "-------" << setw(20) << "--------" << endl;
int n = students.size();
double total = 0;
//cycles through each student
for (int i = 0; i < n; i++)
{
int temp = students[i].size();
int loc = 20 - temp;
cout << students[i] << setw(loc) << grade[i] << endl;
total += grade[i];
}
cout << "Number of students: " << endl;
cout << "------------------" <<endl;
cout << n << " " << endl;
total = (total) / n;
cout << "Average Grade: " << endl;
cout << "--------------" << endl;
//limits the deciaml places to 2
cout << fixed << setprecision(2) << total << " " << endl;
}
The name of the local variable was the same as the name of the global variable.
So you should rename local variable.
62) double grade_;
66) cin >> firstName >> lastName >> grade_;
73) grade.push_back(grade_);
I have an if statement that whenever I implement it, it throws a "read access violation" exception, even though all my other if-statements look pretty similar and work. Everything else works perfectly, so it perplexes me as to why this is happening.
if (records[i].studentArray[j].id == records[i-1].studentArray[j].id) //these two
records[i].retained++;
Full function
void readFile()
{
//Function reads the file and displays all results
int i = 0;
int j = 0;
int count;
Semester records[25]; //only holds up to 25 semesters
Student studentArray;
string semesterName;
ifstream roster;
roster.open ("records.txt");
if (roster.is_open())
{
roster >> semesterName;
while(!roster.eof())
{
roster >> count;
records[i].semesterName = semesterName;
cout << semesterName;
records[i].numStudents = count;
records[i].studentArray = new Student[count];
for (j = 0; j < count; j++)
{
roster >> records[i].studentArray[j];
if (records[i].studentArray[j].year == "FY")
records[i].fycount++;
else if (records[i].studentArray[j].year == "SO")
records[i].socount++;
else if (records[i].studentArray[j].year == "JR")
records[i].jrcount++;
else if (records[i].studentArray[j].year == "SR")
records[i].srcount++;
if (records[i].studentArray[j].id == records[i-1].studentArray[j].id)
records[i].retained++;
}
cout << endl;
cout << "FY: " << records[i].fycount << endl;
cout << "SO: " << records[i].socount << endl;
cout << "JR: " << records[i].jrcount << endl;
cout << "SR: " << records[i].srcount << endl;
cout << "FY gain/loss: " << records[i].fycount - records[i - 1].fycount << endl;
cout << "SO gain/loss: " << records[i].socount - records[i - 1].socount << endl;
cout << "JR gain/loss: " << records[i].jrcount - records[i - 1].jrcount << endl;
cout << "SR gain/loss: " << records[i].srcount - records[i - 1].srcount << endl;
cout << "Percentage gained/lost: " << static_cast<double>(records[i].numStudents - records[i - 1].numStudents) / records[i - 1].numStudents * MULTIPLIER << "%" << endl;
cout << "Number of students retained: " << records[i].retained << endl;
cout << endl;
delete[] records[i].studentArray;
roster >> semesterName;
i++;
}
roster.close();
}
else
cout << "Error: File not found" << endl;
}
Student and semester classes in the .h files
struct Semester
{
string semesterName;
int numStudents;
int fycount = 0;
int socount = 0;
int jrcount = 0;
int srcount = 0;
int retained = 0;
Student *studentArray;
};
class Student
{
public:
string id;
string year;
string name;
string lastName;
friend istream & operator>> (istream &in, Student &s);
};
Thank you!
Do a trace of your application. You will see that i is set to 0 initially and hence -1th location will be invalid in an array.
if (records[i].studentArray[j].id == records[i-1].studentArray[j].id)
That's the source of the error. Better change it to:
if (i > 0 && records[i].studentArray[j].id == records[i-1].studentArray[j].id)
Hope this helps.