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c - 结构有问题,程序不保存输入。我没有经验

转载 作者:太空宇宙 更新时间:2023-11-04 06:33:38 24 4
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编译器没有出现任何错误...它应该是一个基本的电话簿,有 5 个插槽供人们使用。出于某种原因,一切似乎都有效,但它不保存信息。我做错了什么?

typedef struct contact{
char fname[10];
char lname[10];
int pnumber;
};

struct contact p1;
struct contact p2;
struct contact p3;
struct contact p4;
struct contact p5;

int go =0;

int phonebook(struct contact person,int use);

int main(){
while(go == 0){
int contact;
int choice;
int location;

printf("first what position in your contacts would you like to change?(1-5)\n");

scanf("%d",&location);

printf("what would you like to do?\n1. add a contact\n2. change a contact\n3. print a

contact\n4. Quit\n");

scanf("%d",&choice);

switch(location){
case 1:
phonebook(p1,choice);
break;
case 2:
phonebook(p2,choice);
break;
case 3:
phonebook(p3,choice);
break;
case 4:
phonebook(p4,choice);
break;
case 5:
phonebook(p5,choice);
break;
default:
printf("that was not a valid option\n");
}
}

system("PAUSE");
return EXIT_SUCCESS;
}

int phonebook(struct contact person,int use){
switch(use){
case 1:
if(person.pnumber>0){
printf("you already have a contact there\n");
}
else{
printf("What is the contact's first name?\n");
scanf("%s", &person.fname);
printf("\nWhat is the contact's last name?\n");
scanf("%s", &person.lname);
printf("\nWhat is the contact's phone number?\n");
scanf("%d", &person.pnumber);
}
break;
case 2:
if(person.pnumber == 0)
printf("No contact is saved in this position\n");
else{
printf("What is the contact's first name?\n");
scanf("%s", &person.fname);
printf("\nWhat is the contact's last name?\n");
scanf("%s", &person.lname);
printf("\nWhat is the contact's phone number?\n");
scanf("%d", &person.pnumber);
}
break;
case 3:
printf("\nName:%s\n%s \nNumber:%d \n",&person.fname,&person.lname,&person.pnumber);
break;
case 4:
go = 1;
break;
default:
printf("that wasn't an option. Please pick a valid option next time.\n");
}

}

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