C Language
#include<stdio.h>
#include<conio.h>
void main( )
{
int a, b, c, d;
clrscr( );
printf("Enter Three Numbers = ");
scanf("%d %d %d", &a, &b, &c);
d = a > b && a > c ? a: (b > c ? b : c);
printf("Greatest Number = %d", d);
getch( );
}
/*OUTPUT*/
Enter Three Numbers = 10
20
30
Greatest Number = 30