Thread: Passing Pointers to Functions question..

why do we write only the signature of a function addNumbers at the start of the code and later we write the whole function??

how do we define that scanf command will be separated by spaces??

Code:

#include <stdio.h>

int addNumbers(int *fiveNumbers);  

int main() {
  int array[5];
  int i;

  printf("Enter 5 integers separated by spaces: ");

  for(i=0 ; i<5 ; i++) {
    scanf("&#37;d", &array[i]);
  }

  printf("\nTheir sum is: %d\n", addNumbers(array));
  return 0;
}

int addNumbers(int *fiveNumbers) {  /* define function */
  int sum = 0;
  int i;

  for(i=0 ; i<5 ; i++, fiveNumbers++) {
    sum+= *fiveNumbers);            /* work out the total */
  }
  return sum;                       /* return the total   */
}