ScoreManagementSystem/7.c

#include <stdio.h>
#include <string.h>

struct Data
{
	int ID;
	int Class;
	float score1;
	float score2;
	float score3;
	char name[101];
} stu[1001];
int stl = 0;
struct Data* stuflag = 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;

	if (a == stuflag) stuflag = b;
else 
	if (b == stuflag) stuflag = a;
}

void Sort() {
	int i, j;
	for(i = 0; i < stl-1; i++) {
		for (j = 0; j < stl-i-1; j++) {
			if (stu[j].Class < stu[j+1].Class) continue;
			if (stu[j].Class > stu[j+1].Class || 
			total(&stu[j]) < total(&stu[j+1])) swap(&stu[j], &stu[j+1]);
		}
	}
}

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


void Input() {
	printf("Please input info of three students:\n");
	input1();input1();input1();
	if (total(&stu[stl-3]) < total(&stu[stl-2])) swap(&stu[stl-3], &stu[stl-2]);
	if (total(&stu[stl-2]) < total(&stu[stl-1])) swap(&stu[stl-2], &stu[stl-1]);
	if (total(&stu[stl-3]) < total(&stu[stl-2])) swap(&stu[stl-3], &stu[stl-2]);
	printf("%d,%.1f,%.1f\n", stu[stl-3].ID, total(&stu[stl-3]), total(&stu[stl-3])/3.0f);
	printf("%d,%.1f,%.1f\n", stu[stl-2].ID, total(&stu[stl-2]), total(&stu[stl-2])/3.0f);
	printf("%d,%.1f,%.1f\n", stu[stl-1].ID, total(&stu[stl-1]), total(&stu[stl-1])/3.0f);
}

void Print1(int i)
{
	printf("%d %d %s %.1f %.1f %.1f\n", stu[i].ID, stu[i].Class, stu[i].name,
				 stu[i].score1, stu[i].score2, stu[i].score3);
}

void Search() {
	int t; char com[101]; 
	int i;
	scanf("%d %s", &t, com);
	switch(t) {
		case 1: {
			int from, to;
			sscanf(com, "%d-%d", &from, &to);
			for (i=0; i<stl; i++) {
				if (stu[i].Class >= from && stu[i].Class <= to)
					Print1(i);
			}
		}break;
		case 2: {
			int from, to;
			sscanf(com, "%d-%d", &from, &to);
			for (i=0; i<stl; i++) {
				if (stu[i].ID >= from && stu[i].ID <= to)
					Print1(i);
			}
		}break;
		case 3: {
			for (i=0; i<stl; i++) {
				int flag = 1, j;
				for (j=0; com[j] != '*'; j++) {
					if (stu[i].name[j] != com[j]) {
						flag = 0; break;
					}
				}
				if(flag)
					Print1(i);
			}
		}break;
		case 4: {
			float gate;
			sscanf(com, "%f", &gate);
			for (i=0; i<stl; i++) {
				if (total(stu + i) >= gate - 0.01f)
					Print1(i);
			}
		}break;
		case 5: {
			int Class, from, to;
			sscanf(com, "%d.%d-%d", &Class, &from, &to);
			for (i=0; i<stl; i++) {
				if (stu[i].ID >= from && stu[i].ID <= to)
				if (stu[i].Class == Class)
					Print1(i);
			}
		}
	}
}


int main() {
	stu[0] = (struct Data){10001, 11, 99.5, 88.5, 89.5, "Zhang"};
	stu[1] = (struct Data){10002, 12, 77.9, 56.5, 87.5, "Yang"};
	stu[2] = (struct Data){10003, 11, 92.5, 89.0, 60.5, "Liang"};
	stu[3] = (struct Data){10004, 11, 89.6, 56.9, 90.5, "Cai"};
	stu[4] = (struct Data){10005, 14, 55.6, 67.9, 98.9, "Fu"};
	stu[5] = (struct Data){10006, 12, 22.1, 45.9, 99.2, "Mao"};
	stu[6] = (struct Data){10007, 13, 35.6, 67.9, 88.0, "Zhan"};
	stl = 7;
	Sort();
	Search();
}