C编程基础-基础篇 9

#include <stdio.h>

int main() {
    struct Contacts {
        char name[100];
        int age;
        char mobile[12];
    };

    struct Contacts person1 = {"John", 30, };
    printf("name: %s, age: %d, mobile: %s\n", person1.name, person1.age, person1.mobile);

    return 0;
}

name: John, age: 30, mobile:

#include <stdio.h>
#include <string.h>

int main() {
    union Calculation {
        int i;
        float f;
        char str[100];
    };

    union Calculation cal1 = {1};
    printf("cal1.i: %d, cal1.f: %f, cal1.str: %s\n", cal1.i, cal1.f, cal1.str);

    cal1.f = 0.111;
    printf("cal1.i: %d, cal1.f: %f, cal1.str: %s\n", cal1.i, cal1.f, cal1.str);

    strcpy(cal1.str, "None");
    printf("cal1.i: %d, cal1.f: %f, cal1.str: %s\n", cal1.i, cal1.f, cal1.str);

    return 0;
}