Why this code return "0" as result?

Question

#include <stdio.h>
#include <float.h>
int a(int b){
int c;
while (b > 0){
return b + a(b - 1);
}
}
int main()
{
printf("%i",a(10));
return 0;
}

Answer 1

It returns 0 as an exit status meaning no errors have occured. (plus its "int main" you need to return an integer)
If there is a problem, it will exit with anything but 0, usually 1.

Answer 2

I write a recursive function with while statement instead of if ...else statement.But the result is not I expect.Why is this?

Answer 3

The result of the code is 55 which is summation of values 10+9+8+...+1.