Basic Grade Process

/*
Basic Grade Process
Build By C Language
Dev By :: Weerayut Hongsa (Kusumoto)
http://kusumoto.co
*/
 
#include <stdio.h>
#include <conio.h>
main(){
	int a; //announce variable
	a = 0; //set variable to 0 because fixed bug
	printf ("Please Insert Score :: "); //show input message
	scanf ("%d",&a); //get data
	if (a<=50) { //if score <= 50 show 0
	printf("0 \n");
	} else if (a<=59) { //if score <= 59 show 1
		printf("1 \n");
	} else if (a<=69) { //if score <= 69 show 2
		printf("2 \n");
	} else if (a<=79) { //if score <= 79 show 3
		printf("3 \n");
	} else if (a<=89) { //if score <= 89 show 4
		printf("4 \n");
	} else if (a<=101) { //if score <= 101 show error :p
		printf("Error!! \n");
	}
	printf("Good Luck! \n"); //show end message
//End Programs :)
}