so i have been learning c for the past few days and now i have a task to make a Recursion and recursive function. i tried to solve it but it always gives this error back (Unhandled exception at 0x00535379 in cours.exe: 0xC00000FD: Stack overflow (parameters: 0x00000001, 0x00392FC4).) or sometimes it gives the value of 1 of sum any ideas for why?

int factorialNumber(int a,int b)
{
    int sum;
    if (b==a)
    {
        return b;
    }
        sum = a*b;
        return sum    factorialNumber(b   1,a);
}

void main(int sum)
{
    int a=8,b=1;
    factorialNumber(a,b);
    cout <<a <<b<<endl<<sum;
    system("pause>0");
}

CodePudding user response：

There are few other error in you code from C perspective, like invalid syntax for main, missing header, etc. But ignoring them for now to concentrate on factorial thing. You main error order of passing a and b to factorialNumber. Correcting it like below will work.

int factorialNumber(int a,int b)
{
    int sum;
    if (b==a)
    {
        return b;
    }
        sum = a*b;
        return sum    factorialNumber(a,b   1);
}

CodePudding user response：

1. First of all, you are not assigning the value of the factorial method to sum in the main method. FYI, the method signature is wrong as you used void.
2. in the factorial method, you are interchanging the variable during calling the recursive function that leads to an infinity loop.