Arguments - Call by Value(C version)

main

#include <stdio.h>
#include <stdlib.h>

int power(int m, int n);

int main() {
  int m, n;
  system("clear");

  printf("Enter two numbers:\n");
  scanf("%d", &m);
  scanf("%d", &n);
  printf("power(%d, %d) is %d\n", m, n, power(m, n));

  getchar();
  return 0;
}

int power(int base, int n) {
  int p;

  for(p = 1; n > 0; n--) {
    p = p * base;
  }

  return p;
}

In C, all function arguments are passed ``by value.'' This means that the called function is given the values of its arguments in temporary variables rather than the originals. Parameters can be treated as conveniently initialized local variables in the called routine.