回调函数

1、 函数指针 做参数

2、 回调过程

例代码

//
//  main.m
//  C_Project_12
//
//  Created by  on 15/3/26.
//  Copyright (c) 2015年 . All rights reserved.
//

#import 
   
     //课堂练习题：写一函数查找成绩90分以上的学员,使?用回调函数在姓名后加”?高富 帅”。 //1.定义结构体类型 typedef struct student { char name[20]; float score; } Student; Student *generateStudentsInfo(int count); Student *generateStudentsInfo(int count) { Student *stus = malloc(sizeof(Student) * count); for (int i = 0; i < count; i++) { printf("请输入第%d个学生的信息\n", i + 1); printf("姓名:"); scanf("%s", (stus + i)->name); printf("成绩:"); scanf("%f", &(stus + i)->score); } return stus; } void printStudentsInfo(Student *stus, int count); void printStudentsInfo(Student *stus, int count) { printf("\n---------------------------\n"); for (int i = 0; i < count; i++) { printf("姓名:%s\t\t\t\t成绩:%.2f\n", (stus + i)->name, (stus + i)->score); } printf("\n---------------------------\n"); } void modifyName(char *name); void modifyName(char *name) { strcat(name, "-高富帅"); } void searchStudentInfo(Student *stus, int count, float score, void (*point)(char *)); void searchStudentInfo(Student *stus, int count, float score, void (*point)(char *)) { for (int i = 0; i < count; i++) { if ((stus + i)->score > score) { point((stus + i)->name); } } } int main(int argc, const char * argv[]) { Student *stus = generateStudentsInfo(2); printStudentsInfo(stus, 2); searchStudentInfo(stus, 2, 90, modifyName); printStudentsInfo(stus, 2); return 0; }