grade.c

#include <stdio.h>
#include <conio.h>
int main (void)
{
 int marks;

 printf("Enter the number for getting the grade");
 scanf("%d",&marks);

 if(marks>=80 && marks<=100)
 	printf("Congrats this number belongs to A+ grade");

 else if(marks>=75 && marks<=80)
 	printf("This number belongs to A grade");

 else if(marks>=70 && marks<=75)
 	printf("This number belongs to A- grade");

 else if(marks>=65 && marks<=70)
 	printf("This number belongs to B+ grade");

 else if(marks>=60 && marks<=65)
 	printf("This number belongs to B grade");

 else if(marks>=55 && marks<=60)
 	printf("This number belongs to B- grade");

 else if(marks>=50 && marks<=55)
 	printf("This number belongs to C+ grade");

 else if(marks>=45 && marks<=50)
 	printf("This number belongs to C grade");

 else if(marks>=40 && marks<=45)
 	printf("This number belongs to D grade");


 else if(marks>100 && marks<0)
 	printf("This number does not belong to any grade: INVALID");

 else if(marks<=40)
 	printf("Sorry this number belongs to F grade: FAIL");



 printf("\n\n Thank you for using my program\n");
 printf("\n Shihab Ahsan Khan");

 getch();
 return 0;
}