How to make a quiz database using C++ - c++

Question

/This is just the a part of the code that makes the database. Random access to questions will be generated in the same main function. What is wrong in this code? Please take a look and help/
#include<iostream>
#include<cstring>
class ques{
void in_data(char qu[500],char p[25],char q[25],char r[25],char s[25],char ans1)
{
std::strcpy(question,qu);
std::strcpy(a,p);
std::strcpy(b,q);
std::strcpy(c,r);
std::strcpy(d,s);
ans=ans1;
}
};
int main()
{
ques q[2];
q[0].in_data("what is 2+2","alpha","beta","gamma","delta","d");
q[1].in_data("choose a","a","b","c","d","a");
return 0;
}

Answer 1

there are many errors in your code:
1- make in_data() public to be able to call it from outside like in your main otherwise you get compile-time error accessing private data remember members of a class is by default private whereas struct's are public
2- declare member data: question, a, b,... you are using them without declaring them.
3- you declared in_data to take a character as the sixth parameter while you pass to it a const character string in main:
q[0].in_data("what is 2+2","alpha","beta","gamma","delta","d"); // "d" is a constant character string not just a single character so change it to 'd'
q[1].in_data("choose a","a","b","c","d","a"); // look at in_data how was defined.
your code will look like:
#include<iostream>
#include <string>
using namespace std;
class ques
{
public: // make in_data public to use from outside
void in_data(char qu[500], char p[25], char q[25], char r[25], char s[25], char ans1) // so pass eg: 'a' not "a"
{
strcpy(question, qu);
strcpy(a, p);
strcpy(b, q);
strcpy(c, r);
strcpy(d, s);
ans = ans1;
}
private:
char question[500];
char a[25];
char b[25];
char c[25];
char d[25];
char ans;
};
int main()
{
ques q[2];
q[0].in_data("what is 2+2","alpha","beta","gamma","delta",'d');
q[1].in_data("choose a","a","b","c","d",'a');
return 0;
}
Finally why don't you use class string as long as it is a must in your code instead of using arrays of characters?