A decimal integer is input and added to constant while displaying the sum message is issued

/*A decimal integer is input,added to CONSTANT and the sum is displayed .If the sum is less than 20, a message is issued*/

Solution code:-
========

#include <stdio.h>
#define CONSTANT 7
int sum(int num,int constant);
int main(void)
{
int i,add;
printf("Enter a decimal integer : ");
scanf("%d",&i);

add = sum(i,CONSTANT);
if ( add < 20 )
printf("\nAmount %d is less than 20",add);


return 0;
}

int sum(int num,int constant)
{
return (num + constant);
}

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