函数指针终极练习

 

 设计 9个任务函数task0（）-task8（）只输出一句话：如task0（）输出“task0 is called！”；设计一个调度函数schedule（）输入一个字符串如"012345"然后返回一个函数指针数组和字符串的长度作为执行函数 execute（）的参数进行调度任务函数。主函数只有调度函数。

 

#define M 1000typedef void (*ptask)();void task0(){       printf("task0 is called！\n");  }  void task1(){       printf("task1 is called！\n");  }  void task2(){       printf("task2 is called！\n");  }  void task3(){       printf("task3 is called！\n");  }  void task4(){       printf("task4 is called！\n");  }  void task5(){       printf("task5 is called！\n");  }  void task6(){       printf("task6 is called！\n");  }  void task7(){        printf("task7 is called！\n");  }   void task8(){        printf("task7 is called！\n");  }void execute(ptask* fun , int len){    int i= 0 ;    for( i = 0 ; i < len ; i++){        ptask pfun= fun[i];        pfun();    }}void schedule(){    ptask fun[M];    int len ,i,temp;    char str[M];    printf("please input a string\n");    while(    scanf("%s",str),str){    len= strlen(str);    for( i =  0 ; i < len ; i++){        temp = str[i]-'0';        switch(temp){        case 0:fun[i] = task0;break;        case 1:fun[i] = task1;break;        case 2:fun[i] = task2;break;        case 3:fun[i] = task3;break;        case 4:fun[i] = task4;break;        case 5:fun[i] = task5;break;        case 6:fun[i] = task6;break;        case 7:fun[i] = task7;break;        case 8:fun[i] = task8;break;        }    }    execute(fun , len);    }}int main(){    schedule();    return 0;}