list_find.c

c语言版的学生成绩管理系统

#include<stdio.h>
typedef struct link{
    char str[20];
    int  num;
    struct link *next;
}*head;

main(){
    void compare_int(head p,int *cnt);
    void compare_string(head P,char *str);
    void list_search(void *value1,void *node,void (*compare)(void *link_head,void * value));
    void create();
    void emiat
}
void compare_int(void *value,void *per){
    struct link *P=(struct link)per;
    int *val=(int *)value;
    while(p!=NULL){
        if(per->num==*val){
            printf("the value %d find\n",*val );
            return ;   
        }
        else if(per->num>*val){    
                 printf("the value %d find\n",*val);
                 return;
             }
             else if(per->num<*val){
                      printf("the value %d find\n",*val);
                      return;
                  }
        p=p->next;
    }
   printf("have not find %d \n",*val);
}

void compare_string(void *value ,void *string){
    int i=0;
    char flage;
    flage='T';
    while(*(value+i)!=0&&*(string+i)!=0){
        if(*(value+i)!=*(string+i)){
            flage='F';
            break;
        }
        ++i;
    }
    if(*(value+i)==0||*(string+i)==0)
        flage='F';
    if(flage=='T')
        printf("the string of %s has found\n",string);
    else 
        printf("the string of %s has not found\n",string);
}

void list_search(void *value,void *node,void (*compare)(void *value,void *head)){
    while(node!=NULL){
        compare(value,node);
        node=node->next;
    }
}

void enter_value(){
    printf("what kind do want to search?\ns: is string ,n:is number\n");
    char c;
    char temp[20];
    int cnt;
    c=getchar();
    if(c=='s'){
        printf("please enter the string\n");
        scanf("%s",temp);
        getchar();
        list_search(&tmep,head,compare_string);
    }
    else if(c=='n'){
        printf("please enter the number\n");
        scanf("%d",cnt);
        list_search(&cnt,head,compare_int);
    }else {printf("your enter is illegal\n");
           exit(0);
          }
}

void create(){
    head p;
    head=p=(head)malloc(sizeof(struct link));
    head->num=12;
    head->str="hello";
    
}