In the snippet below:
#include <stdio.h>
void swap (int*, int*);
// ^----(1)
int main (void) {
int a = 21;
int b = 17;
swap(&a, &b);
printf("a = %d, b = %d\n", a, b);
return 0;
}
void swap (int *pa, int *pb) {
// ^----(2)
int t = *pa;
*pa = *pb;
*pb = t;
return;
}
Which of these between (1) and (2) can be considered as a function prototype?
Is it called a prototype in C? I’ve always known them as definitions/declarations and sometimes referred to as “headers” because they’re usually defined in header files.