How to find gretest in 3 number using C Programming

C Program to find greatest in 3 numbers

#include  <stdio.h>

int main() {
int a, b, c;

printf("\nEnter value of a, b & c : ");
scanf("%d %d %d", &a, &b, &c);

if ((a > b) && (a > c))
printf("\na is greatest");

if ((b > c) && (b > a))
printf("\nb is greatest");

if ((c > a) && (c > b))
printf("\nc is greatest");

return(0);
}

Output :

Enter value for a,b & c : 15 17 21
c is greatest