sum the numbers using union and structures

• Problem Description

  
  Kamachi decided to write one program in which she has to get one values using structure concept and another values using union concept, the result should add both values.Help to her to write code. 
  
  Input Method
  
  Integer ranges from 1 to 999
  
  Output Method
  
  sum of values
  
  

• Test Case 1

  
  Input (stdin)

  3 4
  
  

  Expected Output

  7

• Test Case 2

  
  Input (stdin)

  5 6
  
  

  Expected Output

  11

• Program

• #include <stdio.h>
  struct sum
  {
    int a,b;
  }s;
  int main()
  {
    int c;
    scanf("%d %d",&s.a,&s.b);
    c=s.a+s.b;
    printf("%d",c);
  
   return 0;
  }