Homework..

array.c

#include <stdio.h>
#include <string.h>
typedef struct
{
	char name[40];
	int math;
	int bangla;
	int english;
	int total;
	float avarage;
	char grade[1];
} Student;

int main(void)
{
	Student student[4];
	int i;
	for (i = 0; i <= 4; i++)
	{
		printf("Enter the marks for student %d\n", i + 1);
		printf("Name: ");
		scanf("%s", student[i].name);
		printf("Math: ");
		scanf("%d", &student[i].math);
		printf("Bangla: ");
		scanf("%d", &student[i].bangla);
		printf("English: ");
		scanf("%d", &student[i].english);

		student[i].avarage = (student[i].bangla + student[i].english + student[i].math) / 3;
		student[i].total = student[i].bangla + student[i].english + student[i].math;

		if (student[i].avarage < 40)
		{
			strcpy(student[i].grade, "F");
		}
		else if (student[i].avarage >= 40 && student[i].avarage < 60)
		{
			strcpy(student[i].grade, "B");
		}
		else if (student[i].avarage >= 60 && student[i].avarage < 80)
		{
			strcpy(student[i].grade, "A");
		}
		else
		{
			strcpy(student[i].grade, "A+");
		}
	}

	printf("Serial\tName\tEng\tMath\tBan\tTotal\tAvarage\tGrade\n");

	for (i = 0; i <= 4; i++)
	{
		printf("%d\t%s\t%d\t%d\t%d\t%d\t%.2f\t%s\n", i + 1, student[i].name, student[i].english, student[i].math, student[i].bangla, student[i].total, student[i].avarage, student[i].grade);
	}

	return 0;
}