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i am attending a online competition. my code is working in my compilier visual studio 2013. but the online judges giving me compilation error.
here is my code.
#include<iostream>
#include<string>
#include<cmath>
#include<fstream>
using namespace std;
void main() {
int first_number;
int second_number;
string str;
char ch;
int count = 0;
ifstream yfile("q4.txt");
while (!yfile.eof())
{
yfile >>first_number;
if (first_number < 0)
first_number = abs(first_number);
yfile >> ch;
yfile >> second_number;
if (second_number < 0)
second_number = abs(second_number);
int gcd;
for (int i = 1; i <= first_number&&i <= second_number; i++){
if (first_number%i == 0 && second_number%i == 0){
gcd = i;
}
}
cout << "Output: " << gcd << endl;
}
can anyone please tell me solution? I will be thankful to you.
}
The code posted has one missing curly brace at the end.
error: ‘::main’ must return ‘int’
Try using
int main() {
instead. And add a return 0; statement at the end (or whatever return value you want).
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my knowledge of c++ is pitiful. I've been stumped on this simple problem for a long time and would just a point to the right the direction. The basis of the program is to have the user chose a number 1-5 and then based on their decision print out a quote that many times. So if they chose the number 4 it will display the quote 4 times.
Here is what I have so far:
#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace std;
int PickNumber()
{
int i;
cout << "Please Enter a Number From 1 to 5:";
cin >> i;
for (int j = 0; j < i; j++)
{
cout << "Congrats!";
}
return i;
}
int main()
{
_getch();
return 0;
}
Just to add an answer to this question already solved by #molbdnilo, #Rietty and #Gox: the PickNumber() function is not called in the main function.
The PickNumber() call just needs to be added to the main function.
int main() {
PickNumber();
return 0;
}
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I am a newbie in C++, I started to learn coding in C++ two weeks ago. Why does my code below always give me result 0 when I build and run? Please help
# include <iostream>
# include <string>
using namespace std;
int main ()
{
int input = 1;
cout << "input your number : \n";
cin >> input;
int faktorial = 1;
for(int i=1;i<=input;i++)
{
faktorial = faktorial * i;
}
cout << "factorial value from number " << input << " is " << faktorial << endl;
}
Your code works: https://ideone.com/CYFaxo
I suspect your problem is, you are looking at program exit code. When you don't return any value from main, program exit code is 0 (this is special case, and only non-void function where you may leave the return statement out), which conventionally means success (non-zero exit code usually indicates some kind of error, by convention).
Try to find the program output from your IDE, it should have the correct printout.
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I wrote a simple code to reverse a string but I get a strange output. For example, if I type "hello" I get at output " qlleh" and I sincerely don't know why.
Here is the code:
#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
int a = 0;
char s[1024],r[1024];
cout<<"Enter a string:";
cin>>s;
for(int i = char_traits<char>::length(s); i >= 0; i--){
//if(isalpha(s[i]))
r[a++] += s[i];
}
cout<<r;
}
You want to use a '=' only. A '+=' will add onto and increment the actual character value. Therefore, 'a' + 2 = 'c'.
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Closed 7 years ago.
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I made a function that will reverse the string, but the output of the reversed string always shifts towards the right by one character.
#include <iostream>
#include <string>
using namespace std;
void reverse(string string1)
{
cout << endl;
for (int i = string1.size(); i >= 0; i--)
{
cout << string1[i];
}
cout << endl;
}
int main()
{
string string1;
getline(cin, string1);
reverse(string1);
system("pause");
return 0;
}
Your first output is of a character that does not exist.
std::string's leaky abstraction means that your first iteration is printing '\0', which apparently looks like a space in your configuration.
Begin at string1.size() - 1.
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What have I done wrong with the following code?
#include <iostream>
using namespace std;
main ()
{
int a;
int b;
int sum;
cout << "Enter first number \n";
cin >> a;
cout << "Enter second number \n";
cin >> b;
sum = a+b;
cout << "The sum of both numbers is" << sum << endl;
return 0;
}
Does the editor you are using tells errors, so the code is not executing? Or som exception rises? Or it is executing but nothing is shown? Please specify your problem accurately.
Anyway, you must use
int main ()
instead of
main()
Notice that your code returns a value. The last line of you code is:
return 0;
Thus, you must specify an int return type.
Check your initial lines with this.
#include <iostream>
using namespace std;
int main ()
{