Declarations and Initializations - C Programming Questions and Answers

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What is the output of the program?

#include
 int main() 
{    
    union a     
    {        
    int i;         
    char ch[2];     
};    
   union a u;   
   u.ch[0] = 3;    
   u.ch[1] = 2;  
   printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);      

  return 0; 
}

3, 2, 515

515, 2, 3

3, 2, 5

None of these

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Answer : Option A

Explanation :

printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i); It prints the value of u.ch[0] = 3, u.ch[1] = 2 and it prints the value of u.i means the value of entire union size.