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100 lines
2.3 KiB
100 lines
2.3 KiB
#include <stdio.h>
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#include <string.h>
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struct Data
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{
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int ID;
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int Class;
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float score1;
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float score2;
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float score3;
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char name[101];
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} stu[1001];
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int stl = 0;
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struct Data* stuflag = 0;
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float total(struct Data* a) {
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return a->score1 + a->score2 + a->score3;
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}
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void swap(struct Data* a, struct Data* b) {
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struct Data t = *a;
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*a = *b;
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*b = t;
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if (a == stuflag) stuflag = b;
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else
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if (b == stuflag) stuflag = a;
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}
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void Sort() {
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int i, j;
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for(i = 0; i < stl-1; i++) {
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for (j = 0; j < stl-i-1; j++) {
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if (stu[j].Class < stu[j+1].Class) continue;
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if (stu[j].Class > stu[j+1].Class ||
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total(&stu[j]) < total(&stu[j+1])) swap(&stu[j], &stu[j+1]);
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}
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}
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}
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void input1() {
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scanf("%d", &stu[stl].ID);
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scanf("%f", &stu[stl].score1);
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scanf("%f", &stu[stl].score2);
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scanf("%f", &stu[stl].score3);
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stl++;
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}
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void Input() {
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printf("Please input info of three students:\n");
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input1();input1();input1();
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if (total(&stu[stl-3]) < total(&stu[stl-2])) swap(&stu[stl-3], &stu[stl-2]);
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if (total(&stu[stl-2]) < total(&stu[stl-1])) swap(&stu[stl-2], &stu[stl-1]);
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if (total(&stu[stl-3]) < total(&stu[stl-2])) swap(&stu[stl-3], &stu[stl-2]);
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printf("%d,%.1f,%.1f\n", stu[stl-3].ID, total(&stu[stl-3]), total(&stu[stl-3])/3.0f);
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printf("%d,%.1f,%.1f\n", stu[stl-2].ID, total(&stu[stl-2]), total(&stu[stl-2])/3.0f);
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printf("%d,%.1f,%.1f\n", stu[stl-1].ID, total(&stu[stl-1]), total(&stu[stl-1])/3.0f);
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}
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void Modify() {
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struct Data t;
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scanf("%d", &t.ID);
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scanf("%d", &t.Class);
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scanf("%s", t.name);
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scanf("%f", &t.score1);
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scanf("%f", &t.score2);
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scanf("%f", &t.score3);
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int i;
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for(i=0; i<stl; i++) {
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if (t.ID == stu[i].ID) {
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stu[i] = t;
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stuflag = stu + i;
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break;
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}
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}
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Sort();
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for(i=0; i<stl; i++) {
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if (i>0 && stu[i].Class == stu[i-1].Class) printf(" ");
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else printf("%2d ", stu[i].Class);
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printf("%d %s %2.1f %2.1f %2.1f", stu[i].ID, stu[i].name,
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stu[i].score1, stu[i].score2, stu[i].score3);
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if (stuflag == stu + i) printf(" modified");
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printf("\n");
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}
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}
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int main() {
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stu[0] = (struct Data){10001, 11, 99.5, 88.5, 89.5, "Zhang"};
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stu[1] = (struct Data){10002, 12, 77.9, 56.5, 87.5, "Yang"};
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stu[2] = (struct Data){10003, 11, 92.5, 89.0, 60.5, "Liang"};
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stl = 3;
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Modify();
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} |