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2021-05-20 07:32
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C语言关于定义结构体

从键盘输入3个人的姓名和电话号码,编程实现根据姓名或电话号码进行查询的功能。 【提示】定义结构体 per,包含成员:name[20]表示姓名,phone[20]表示电话码。姓 名和电话号码的比较可使用字符串库函 数 strcmp()实现,增加头文件#include 输入2表示根据电话号码进行查询,输入0表示 另外要求输入1表示根据姓名进行查询,结束。

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1条回答 默认 最新

  • benbenli 2021-05-20 08:18
    最佳回答
    
    #include <stdio.h>
    #include <string.h>
    
    #define N 3 
    
    typedef struct person
    {
        char name[20];
        char phone[20];
    } person;
    
    int main()
    {
        person contacts[N];
        int i, choice;
        char query[20];
        
        for (i = 0; i < N; ++i)
        {
            printf("Please enter the name and phone of person %d (no space in person's name): ", i + 1);
            scanf("%s%s", contacts[i].name, contacts[i].phone);
        }
        
        while (1)
        {
            printf("Please enter 1 and name to query, or 2 phone to query, or 0 to exit: ");
            scanf("%d", &choice);
            if (choice == 0)
                break;
            else if (choice == 1)
            {
                scanf("%s", query);
                for (i = 0; i < N; ++i)
                {
                    if (strcmp(contacts[i].name, query) == 0)
                    {
                        printf("Found name [%s} and its phone is [%s].\n", query, contacts[i].phone);
                        break;
                    }
                }
                    
                if (i == N)
                {
                    printf("Not found.\n");
                }
            }
            else if (choice == 2)
            {
                scanf("%s", query);
                for (i = 0; i < N; ++i)
                {
                    if (strcmp(contacts[i].phone, query) == 0)
                    {
                        printf("Found phone [%s} and its name is [%s].\n", query, contacts[i].name);
                        break;
                    }
                }
                
                if (i == N)
                {
                    printf("Not found.\n");
                }
            }
            else
            {
                printf("Invalid choice [%d].\n", choice);
            }
            fflush(stdin); // clear inout buffer in case there are extra cahracters in the previous input
        }
        
        return 0;
    }
    
    // Output:
    Please enter the name and phone of person 1 (no space in person's name): ZhangSan 01065879876
    Please enter the name and phone of person 2 (no space in person's name): LiSi 13888789900
    Please enter the name and phone of person 3 (no space in person's name): WangWu 02123459876
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 1 ZhangSan
    Found name [ZhangSan} and its phone is [01065879876].
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 1 ZhaoLiu
    Not found.
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 2 02123459876
    Found phone [02123459876} and its name is [WangWu].
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 2 13899990000
    Not found.
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 3
    Invalid choice [3].
    Please enter 1 and name to query, or 2 phone to query, or 0 to exit: 0
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