#include #include typedef struct student{ char name[20]; int code; int kor, eng, math; }STUDENT; STUDENT Input(); void Output(STUDENT info[], int cnt); char grade(int score); int main(){ STUDENT S[10]; int cnt = 0, select; int i, j; int code; while(1) { printf("\t学生信息管理系统\n\n"); printf("\t\t1\t添加\n"); printf("\t\t2\t删除\n"); printf("\t\t3\t查询\n"); printf("\t\t0\t结束\n"); printf("\t\t您的选择[0-3]："); scanf("%d", &select); if(select < > 3) continue; if(select == 0) { printf("退出系统!\n"); break; } if(select == 1) { S[cnt++] = Input(); } else if(select == 2) { printf("\t\t待删除学生的学号："); scanf("%d", &code); for(i=0; i= cnt) { printf("学号不存在，删除失败！\n"); } else { for(j=i+1; j= cnt) { printf("学号不存在，查找失败！\n"); } else { printf("\t查询结果：\n"); Output(S, i); } } } return 0;} STUDENT Input(){ STUDENT stu; printf("\t\t新学生信息\n"); printf("\t\t学号："); scanf("%d", &stu.code); printf("\t\t姓名："); getchar(); gets(stu.name); printf("\t\t3门课程成绩(以空格分隔)："); scanf("%d%d%d", &stu.kor, &stu.eng, &stu.math); return stu;} void Output(STUDENT info[], int cnt){ printf("学号：%d\n",info[cnt].code); printf("姓名："); puts(info[cnt].name); printf("成绩：%c %c %c\n", grade(info[cnt].kor), grade(info[cnt].eng), grade(info[cnt].math));} char grade(int score){ if(score < > 100) return 'F'; if(score >= 90) return 'A'; if(score >= 80) return 'B'; if(score >= 70) return 'C'; if(score >=60) return 'D'; else return 'E';} 运行测试：
