pass,fail,first,distinction

#include <stdio.h>

int
main (void)
{
   /* declarations */
   int marks;
 
   printf ("Calculate my class: ");
   scanf ("%d", &marks);
   printf ("You entered: %d\n", marks );
 


if(marks>45 && marks<=60)
printf("Pass Class\n");
 else
  if(marks>60 && marks<=70)
printf("First Class \n");
else
if(marks>70 && marks<=100)
printf("Distinction\n");
else
if(marks>-1 && marks<=45)
printf("Fail\n");
   return (0);
}