ScoreManagementSystem/1.c

#include <stdio.h>

struct Data
{
	int ID;
	float score1;
	float score2;
	float score3;
} stu[1001];
int stl = 0;

float total(struct Data* a) {
	return a->score1 + a->score2 + a->score3;
}

void swap(struct Data* a, struct Data* b) {
	struct Data t = *a;
	*a = *b;
	*b = t;
}

void input1() {
	scanf("%d", &stu[stl].ID);
	scanf("%f", &stu[stl].score1);
	scanf("%f", &stu[stl].score2);
	scanf("%f", &stu[stl].score3);
	stl++;
}

void Question1() {
	printf("Please input info of three students:\n");
	input1();input1();input1();
	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-3].ID, stu[stl-3].score1, stu[stl-3].score2, stu[stl-3].score3, total(&stu[stl-3]));
	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-2].ID, stu[stl-2].score1, stu[stl-2].score2, stu[stl-2].score3, total(&stu[stl-2]));
	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-1].ID, stu[stl-1].score1, stu[stl-1].score2, stu[stl-1].score3, total(&stu[stl-1]));

}

int main() {
	printf("                              1.Input\n");
	printf("                              2.Output\n");
	printf("                              3.Order\n");
	printf("                              4.Quit\n");
	char t;
	scanf("%c", &t);
	switch(t) {
		case 'i':
		printf("You are trying to Input info\n");
		break;
		case 'o':
		printf("You are trying to Output info\n");
		break;
		case 'm':
		printf("You are trying to Make things ordered\n");
		break;
		case 'q':
		printf("You are trying to Quit\n");
		break;
		default:
		printf("Wrong input\n");
		break;
	}
}