Functions

1. Example 1
   #include <stdio.h>
   int cube (int x);         /* function prototype */

   int main(){
   int input_num, func_result;
   printf("please, enter the integer: ");
   scanf("%d", &input_num);

   func_result = cube (input_num);      /* function call (invokation) */

   printf("The cube of %d is %d\n ", input_num, func_result);
   return 0;
   } /* end main function */

   /* definition of the function cube */
   /* function cube has one integer parameter and returns the cube of parameter */

   int cube (int x){
   int res;
   res = x*x*x:
   return res;
   }/* end function cube */

2. Example 2
   #include <stdio.h>
   int cube (int x);         /* function prototype */

   int main(){
   int x;
   printf("please, enter the integer: ");
   scanf("%d", &x);

   printf("The cube of %d is %d\n ",x, cube (x) ); /* function call inside printf */
   return 0;
   } /* end main function */

   /* definition of the function cube */
   /* function cube has one integer parameter and returns the cube of parameter */

   int cube (int x){
   return x*x*x;
   }/* end function cube */

3. Example 3
   #include <stdio.h>
   int cube (int x);         /* function prototype */

   int main(){
   int x, i;
   printf("please, enter the integer: ");
   scanf("%d", &x);
   printf("the cubes of all numbers between 0 and %d are\n: " , x);

   for (i = 0; i<= x; i++){
   printf("%d\t", cube(i));
   }
   return 0;
   } /* end main function */

   /* definition of the function cube */
   /* function cube has one integer parameter and returns the cube of parameter */

   int cube (int x){
   return x*x*x;
   }/* end function cube */