try yourself |run program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 short a; 
 clrscr(); 
 printf("Enter value of a: "); 
 scanf("%d",&a); /*  & is used before variable name when you want to read data*/ 
 printf("\n value of a = %d",a); 
 getch(); 
}

Program Output

Enter value of a: 21 
value of a = 21