C語言結構體變量使用與文件操作綜合實例

編輯：關於C語言

結構體成員訪問

結構體變量通過「變量名.成員名」訪問成員，該表達式類型即為成員類型，可像普通變量一樣賦值、運算、輸入輸出。

綜合實例：員工工資錄入與文件存儲

#include <stdio.h>

int main() {
    struct {
        char name[8];
        int age;
        char sex[2];
        char depart[20];
        float wage1, wage2, wage3, wage4, wage5;
    } a;

    FILE *fp;
    float wage;
    char c = 'Y';

    fp = fopen("wage.dat", "w"); // 創建只寫文本文件

    while (c == 'Y' || c == 'y') {
        printf("\nName: ");
        scanf("%s", a.name);

        printf("Age: ");
        scanf("%d", &a.age); // 修正：原代碼誤用 &a.wage

        printf("Sex: ");
        scanf("%s", a.sex); // 修正：原代碼誤用 %d

        printf("Dept: ");
        scanf("%s", a.depart);

        printf("Wage1: "); scanf("%f", &a.wage1);
        printf("Wage2: "); scanf("%f", &a.wage2);
        printf("Wage3: "); scanf("%f", &a.wage3);
        printf("Wage4: "); scanf("%f", &a.wage4);
        printf("Wage5: "); scanf("%f", &a.wage5);

        wage = a.wage1 + a.wage2 + a.wage3 + a.wage4 + a.wage5;
        printf("The sum of wage is %6.2f\n", wage);

        fprintf(fp, "%10s%4d%4s%30s%10.2f\n",
                a.name, a.age, a.sex, a.depart, wage);

        while (1) {
            printf("Continue? ");
            c = getche();
            if (c=='Y'||c=='y'||c=='N'||c=='n') break;
        }
    }

    fclose(fp);
    return 0;
}