建立，查询，手机通讯录！实在不会纠正错误！求解，纠正时请讲解一下！谢了！！！
建立手机通讯录，并查询联系人，查询时可通过联系人姓名，年龄或手机号码查询。
#include <stdio.h>
#include<string.h>
struct friends_list{
    char name[10];
    int age;
    char telephone[13];
   
};
int count=0;
void new_friend(struct friends_list friends[]);
void search_friend(struct friends_list friends[],char*name);
void search_friend(struct friends_list friends[],int *age);
void search_friend(struct friends_list friends[],char *telephone);
int main(void)
{int choice,choice2;
char name[10];
struct friends_list friends[50];
do{
    printf("手机通讯录功能选项：1：新建 2：查询 0：退出\n");
    printf("请选择功能：");
    scanf("%d",&choice);
    switch(choice){
        case 1:
        new_friend(friends);
        break;
        case 2:
        printf("请输入要查找的联系人的相关资料；1:姓名 2:年龄 3:号码 4:退出\n");
        scanf("%d",&choice2);
        switch(choice2)
            {
             case 1:
              printf("请输入要查找的联系人姓名：");
               scanf("%s",name);
            search_friend(friends,name);
             break;
            case 2:
            printf("请输入要查找的联系人的年龄\n");
              scanf("%d",&age);
            break;
              case 3:  
               printf("请输入联系人的电话号码：\n");
            scanf("%s",telephone);
            search_friend(friends,telephone);
            break;
         }
         case 0:
        break;
        }
while(choice!=0);
printf("谢谢使用通讯功能！\n");
   
    return 0;
}




void new_friend(struct friends_list friends[])
    {
    struct friends_list f;
    if(count==50){
        printf("手机通讯录已满!\n");
        return;
    }
    printf("请输入新联系人的姓名：");
    scanf("%s",f.name);
    printf("请输入新联系人的年龄：");
    scanf("%d",&f.name);
    printf("请输入新联系人的联系电话：");
    scanf("%s",f.telephone);
    friends[count]=f;
    count++;
}
void search_friend(struct friends_list friends[],char * name)
{
    int i,flag=0;
    if(count==0){
     printf("通讯录是空的！\n");
     return;
    }
    for(i=0;i<count;i++)
    if(strcmp(name,friends[i].name)==0){
        flag=1;
        break;
    }
    if(flag){
        printf("姓名：%s\t",friends[i].name);
        printf("年龄：%d\t",friends[i].age);
        printf("电话:%s\n",friends[i].telephone);
    }
    else
    printf("无此联系人！");
}
void search_friend(struct friends_list friends[],int *age)
{int j,f=0;if(count==0){
    printf("通讯录为空~!!!\n");
    return;
} for(j=0;j<count;j++)
if(strcmp(age,friends[j].age)==0)
    {f=1;
     break;
     }
if(f){
          printf("姓名：%s\t",friends[i].name);
        printf("年龄：%d\t",friends[i].age);
        printf("电话:%s\n",friends[i].telephone);   
     }
else printf("查无此人！！！！！！！！！！\n");
   
}
void search_friend(struct friends_list friends[],char *telephone){
    int i,flog=0;if(count==0){
        printf("通讯录为空！！！！！！！\n");
        return;;
         }
         for(i=0;i<count;i++)
             if(strcmp(telephone,friends[i].telephone)==0)
                 {flog=1;
                 break;
                 }
                 if(flog){
           printf("姓名：%s\t",friends[i].name);
        printf("年龄：%d\t",friends[i].age);
        printf("电话:%s\n",friends[i].telephone);
                 }
    else printf("查无此人！！！！！！！！！！\n");
}