Programming Forums - View Single Post - Returning a value from a variable to the main function

Eggbert · Apr 26th, 2005, 9:34 AM

>while (5 == 5) {
This is strange. Not only that you used <constant> == <constant>, but because you chose 5 as the constant. A more conventional way to create an infinite while loop is

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while ( 1 ) {
  /* Body */
}

>SUM (int res);
A function call does not declare parameters, it takes arguments:

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SUM (n1, n2);

Here is the same program with the necessary fixes:

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#include <stdio.h>

int SUM (int n1, int n2);

int main ()
{
  int n1, n2, i;

  while (1) {
    printf ("To close the program, type 0: ");
    scanf ("%d", &i);
    if (i == 0) break;
    printf ("Type the numbers that should be used to do the sum: ");
    scanf ("%d %d", &n1, &n2);
    SUM (n1, n2);
  }
}

int SUM (int n1, int n2)
{
  int res;
  res = n1 + n2;
  printf ("The result is: %d", res);
  return res;
}

Apr 26th, 2005, 9:34 AM	#2
Eggbert Professional Programmer Join Date: Nov 2004 Posts: 250 Rep Power: 5	>while (5 == 5) { This is strange. Not only that you used <constant> == <constant>, but because you chose 5 as the constant. A more conventional way to create an infinite while loop is (Toggle Plain Text) while ( 1 ) { /* Body / } while ( 1 ) { / Body */ } >SUM (int res); A function call does not declare parameters, it takes arguments: (Toggle Plain Text) SUM (n1, n2); SUM (n1, n2); Here is the same program with the necessary fixes: (Toggle Plain Text) #include <stdio.h> int SUM (int n1, int n2); int main () { int n1, n2, i; while (1) { printf ("To close the program, type 0: "); scanf ("%d", &i); if (i == 0) break; printf ("Type the numbers that should be used to do the sum: "); scanf ("%d %d", &n1, &n2); SUM (n1, n2); } } int SUM (int n1, int n2) { int res; res = n1 + n2; printf ("The result is: %d", res); return res; } #include <stdio.h> int SUM (int n1, int n2); int main () { int n1, n2, i; while (1) { printf ("To close the program, type 0: "); scanf ("%d", &i); if (i == 0) break; printf ("Type the numbers that should be used to do the sum: "); scanf ("%d %d", &n1, &n2); SUM (n1, n2); } } int SUM (int n1, int n2) { int res; res = n1 + n2; printf ("The result is: %d", res); return res; }