C语言实现学生管理系统

#include "struct.h" void H_help() { for (int i = 0; i < 46; i++) { printf("*"); } printf("\n"); printf(" *\t学生成绩管理系统————帮助菜单\t *\n"); for (int i = 0; i < 46; i++) { printf("*"); } printf("\n"); printf(" *\tH = 显示帮助菜单\t\t *\n"); printf(" *\tT = 成绩录入\t\t\t *\n"); //少 printf(" *\tA = 计算学生平均分\t\t *\n"); // printf(" *\tL = 列出成绩表\t\t\t *\n"); // printf(" *\tP = 按平均成绩由高到低排序\t *\n"); //多2 printf(" *\tS = 按学号查询学生成绩\t\t *\n"); //多1 printf(" *\tC = 清屏\t\t\t *\n"); //少3 printf(" *\tQ = 退出系统\t\t\t *\n"); //少2 for (int i = 0; i < 46; i++) { printf("*"); } printf("\n"); printf(" *\tCopyright <C> 2011.06.12 By 姓名 *\n"); for (int i = 0; i < 46; i++) { printf("*"); } printf("\n"); } void T_Type(int num) { int i; printf("请输入%d名学生的三门课成绩：\n", num); printf("学号 语文 数学 外语\n"); for (i = 0; i < num; i++) { scanf("%d %f %f %f", &stdt[i].id, &stdt[i].Languages, &stdt[i].math, &stdt[i].Foreign); } } void L_List(int num) { int i; printf("学生成绩如下：\n"); if (stdt[0].average != 0) { printf("学号\t语文\t数学\t外语\t平均分\n"); for (i = 0; i < num; i++) { printf("%d\t%.1f\t%.1f\t%.1f\t%.1f\n", stdt[i].id, stdt[i].Languages, stdt[i].math, stdt[i].Foreign, stdt[i].average); } } else { printf("学号\t语文\t数学\t外语\n"); for (i = 0; i < num; i++) { printf("%d\t%.0f\t%.0f\t%.0f\n", stdt[i].id, stdt[i].Languages, stdt[i].math, stdt[i].Foreign); } } } int main(int argc, char const *argv[]) { char orders; int order, i, id; char arr[10] = {'H', 'T', 'A', 'L', 'P', 'S', 'C', 'Q'}; H_help(); printf("请输入命令="); scanf("%c", &orders); getchar(); int num = 0; while (num == 0) { if (orders != 'T') { printf("成绩表为空！请先使用命令 T 录入学生成绩。\n"); printf("请输入命令="); scanf("%c", &orders); } else if (orders == 'T') { printf("请输入学生人数："); scanf("%d", &num); T_Type(num); break; } } while (num > 0) { getchar(); printf("请输入命令="); scanf("%c", &orders); for (i = 0; i < 8; i++) { if (orders == arr[i]) { order = i + 1; break; } } if (orders == 'Q') { exit(0); } else { switch (order) { case H: H_help(); break; case T: T_Type(num); break; case A: average(stdt, num); break; case L: L_List(num); break; case P: sort(stdt, num); break; case S: find(); break; case C: system("clear"); } } } return 0; }