int main()
{
   int m, n;
   printf("Enter 2 integers:");
   scanf("%d,%d", m, n);
 
   printf("%d + %d is %d\n", m, n, m + n);
   return 0;
}
 
 
[thunder] ~ > cc format.c
[thunder] ~ > a.out
Enter 2 integers:55,  65
0 + 0 is 0


int main()
{
   int m, n, sum;
   printf("Enter 2 integers:");
   scanf("%d,%d", &m, &n);
 
   printf("%d + %d is %d\n", m, n, m + n);
   return 0;
}
 
 
[thunder] ~ > cc format.c
[thunder] ~ > a.out
Enter 2 integers:55,  65
55 + 65 is 120


Review of Problem to calculate product of fractions:

Sample dialogue:  

Enter first fraction: 4 / 6
Enter second fraction: 6 / 8
4/6 x 6/8 is 24/48
24/48 is 50.0000%

Analysis

Data requirements:

Problem inputs

int num_1,
     denom_1,
     num_2,
     denom_2;

Problem outputs
int num_prod,       /* numerator of product */
    denom_prod     /* denominator of product */
double percent        /* percentage */

Formulas:
num_prod = num_1 * num_2
denom_prod = denom_1 * denom_2
percent = (num_prod) / (denom_prod) * 100;

Design:

1. Read first fraction
2. Read second fraction
3. Calculate product
4. Calulate percentage
5. Display product
6. Display percentage


Implementation

#include <stdio.h>

int main()
{
   /* variable declarations */
   /* Problem inputs */

   int num_1,
     denom_1,
     num_2,
     denom_2;

   /* Problem outputs */
   int num_prod, /* num of product */
     denom_prod; /* denom of product */
   double percent;   /* percentage */

   /* Read first fraction */
   printf("Enter first fraction: ");
   scanf("%d/%d", &num_1, &denom_1);

   /* Read second fraction */
   printf("Enter second fraction: ");
   scanf("%d/%d", &num_2, &denom_2);

   /* Calculate product */
   num_prod = num_1 * num_2;
   denom_prod = denom_1 * denom_2;

   /* Calulate percentage */
   percent = ((double) num_prod / 
          (double) denom_prod) * 100.0;

   /* Display product */
   printf("%d/%d x %d/%d is %d/%d\n",
        num_1, denom_1, num_2, denom_2, 
        num_prod, denom_prod);

   /* Display percentage */
   printf("%3d/%3d is %4.1f %%\n",
      num_prod, denom_prod, percent);

   return 0;
}

Enter first fraction: 4/6
Enter second fraction: 6/8
4/6 x 6/8 is 24/48
 24/ 48 is 50.0 %

Assignment:  Modify this program so 
that it calculates the sum of 2 
fractions rather than their product:

Hint:  4/6 + 6/8 is 32/48 + 36/48 = 
68/48