Question

我的代码工作正常，除了一行不断打印出应该用于下一行的数据。

输出应该看起来像这样：

Address Details
Street number: 100
Street name: Bedrock
Apartment: 14
Postal code: Z8Z 7R7
City: Markham

相反，我的输出是这样的：

Address Details
Street number: 100
Street name: Bedrock
Apartment: 14
Postal code: Z8Z 7R7Markham
City: Markham

如您所见，Markham沿着同一行邮政编码打印。以下是可能导致此错误的潜在文件。非常感谢所有帮助！

a1ms4.c文件：

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

// This source file needs to "know about" the structures you declared
// in the header file before referring to those new types:
// HINT: put the header file name in double quotes so the compiler knows
//       to look for it in the same directory/folder as this source file
// #include your contacts header file on the next line:
#include "contacts.h"


int main(void)
{
    // Declare variables here:

    // Create a variable of type Contact and call it something self-describing like "contact"
    // - HINT: Be sure to initialize the values to 0 and empty C strings
    struct Contact contact = {
        { "", "", "" },
        {0," ", 0, " ", " "},
        { "", "", "" }
    };


    // Display the title
    printf("Contact Management System\n");
    printf("-------------------------\n");



    // Call the Contact function getName to store the values for the Name member
    getName(&contact.name);


    // Call the Contact function getAddress to store the values for the Address member
    getAddress(&contact.address);


    // Call the Contact function getNumbers to store the values for the Numbers member
    getNumbers(&contact.numbers);



    // Display Contact summary details

    printf("\nContact Details\n");
    printf("---------------\n");
    printf("Name Details\n");
    printf("First name: %s", contact.name.firstName);
    printf("\n");
    printf("Middle initial(s): %s", contact.name.middleInitial);
    printf("\n");
    printf("Last name: %s", contact.name.lastName);
    printf("\n");
    printf("\n");
    printf("Address Details\n");
    printf("Street number: %d", contact.address.streetNumber);
    printf("\n");
    printf("Street name: %s", contact.address.street);
    printf("\n");
    printf("Apartment: %d", contact.address.apartmentNumber);
    printf("\n");
    printf("Postal code: %s", contact.address.postalCode);
    printf("\n");
    printf("City: %s", contact.address.city);
    printf("\n");
    printf("\n");
    printf("Phone Numbers:");
    printf("\n");
    printf("Cell phone number: %s", contact.numbers.cell);
    printf("\n");
    printf("Home phone number: %s", contact.numbers.home);
    printf("\n");
    printf("Business phone number: %s", contact.numbers.business);
    printf("\n");
    printf("\n");






    // Display Completion Message
    printf("Structure test for Contact using functions done!\n");

    return 0;
}

contacts.c文件

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

// This source file needs to "know about" the structures you declared
// in the header file before referring to those new types:
// HINT: put the header file name in double quotes so the compiler knows
//       to look for it in the same directory/folder as this source file
// #include your contacts header file on the next line:
#include "contacts.h"

// Get and store from standard input the values for Name
// Put your code here that defines the Contact getName function:
void getName(struct Name * name) {
    //Variable/Struct declaration:
    char notify;

    // Contact Name Input:
    printf("Please enter the contact's first name: ");
    scanf("%30s", name->firstName);

    //Prompts the user to see if they want to enter a middle name using y, yes or n, no.
    printf("Do you want to enter a middle initial(s)? (y or n): ");
    scanf("%s", &notify);

    if (notify == 'y' || notify == 'Y')
    {
        printf("Please enter the contact's middle initial(s): ");
        scanf("%6s", name->middleInitial);
    }

    printf("Please enter the contact's last name: ");
    scanf("%30s", name->lastName);
}


// Get and store from standard input the values for Address
// Put your code here that defines the Contact getAddress function:
void getAddress(struct Address * address) {
    //Variable/Structure declaration: 
    char notify;

    // Contact Address Input:
    printf("Please enter the contact's street number: ");
    scanf("%d",& (address->streetNumber));

    printf("Please enter the contact's street name: ");
    scanf("%40s", address->street);

    //Prompts the user to see if they want to enter an apartment number using yes, or no.
    printf("Do you want to enter an apartment number? (y or n): ");
    scanf("%s", &notify);

    if (notify == 'y' || notify == 'Y')
    {
        printf("Please enter the contact's apartment number: ");
        scanf("%d",& (address->apartmentNumber));
    }

    printf("Please enter the contact's postal code: ");
    scanf(" %[^\n]", address->postalCode);

    printf("Please enter the contact's city: ");
    scanf(" %40s", address->city);

}


// Get and store from standard input the values for Numbers
// Put your code here that defines the Contact getNumbers function:
void getNumbers(struct Numbers *numbers) {
    //Variable/Structure declaration:
    char notify;

    // Contact Numbers Input:
    printf("Do you want to enter a cell phone number? (y or n): "); //Prompt the user to see if they want to enter a cellphone.
    scanf(" %s", &notify);

    if (notify == 'y' || notify == 'Y')
    {
        printf("Please enter the contact's cell phone number: ");
        scanf("%20s", numbers->cell);
    }

    printf("Do you want to enter a home phone number? (y or n): ");
    scanf(" %s", &notify);

    if (notify == 'y' || notify == 'Y')
    {
        printf("Please enter the contact's home phone number: ");
        scanf("%20s", numbers->home);
    }

    printf("Do you want to enter a business phone number? (y or n): ");
    scanf(" %s", &notify);

    if (notify == 'y' || notify == 'Y')
    {
        printf("Please enter the contact's business phone number: ");
        scanf("%20s", numbers->business);
    }
}

contacts.h

// Structure type Name declaration (Milestone 1)
struct Name {
    char firstName[31];
    char middleInitial[7];
    char lastName[36];
};

// Structure type Address declaration 
// Place your code here... (from Milestone 1)
struct Address {
    int streetNumber;
    char street[40];
    int apartmentNumber;
    char postalCode[7];
    char city[40];
};


// Structure type Numbers declaration
// Place your code here... (from Milestone 1)
struct Numbers {
    char cell[20], home[20], business[20];
};

Answer 1

你应该在邮政编码的末尾有一个空终结符：

struct Address {
    int streetNumber;
    char street[40];
    int apartmentNumber;
    char postalCode[8];// add space for the null terminator
    char city[40];
};

printf("Please enter the contact's postal code: ");
scanf(" %[^\n]", address->postalCode);
address->postalCode[7] = '\0'; // add a null terminator

这应该足以解决问题

C编程：如何防止printf语句打印出新的行值？

1 个答案: