宏： DATE , TIME , FILE , LINE - YFROBOT创客社区

[C] 纯文本查看 复制代码

#include <stdio.h>



int main(void) {

    int answer;

    short x = 1;

    long y = 2;

    float u = 3.0;

    double v = 4.4;

    long double w = 5.54;

    char c = 'p';;



    // __DATE__, __TIME__, __FILE__, __LINE__ 为预定义宏

    printf("Date : %s\n", __DATE__);

    printf("Time : %s\n", __TIME__);

    printf("File : %s\n", __FILE__);

    printf("Line : %d\n", __LINE__);

    printf("Enter 1 or 0 : ");

    scanf("%d", &answer);



    // 这是一个条件表达式

    printf("%s\n", answer?"You sayd YES":"You said NO");



    // 各种数据类型的长度

    printf("The size of int %d\n", sizeof(answer));

    printf("The size of short %d\n", sizeof(x));

    printf("The size of long %d\n", sizeof(y));

    printf("The size of float %d\n", sizeof(u));

    printf("The size of double %d\n", sizeof(v));

    printf("The size of long double %d\n", sizeof(w));

    printf("The size of char %d\n", sizeof(c));

}

[C] 纯文本查看 复制代码

Date : Feb 11 1997

Time : 13:51:31

File : white.c

Line : 20

Enter 1 or 0 : 1

You sayd YES

The size of int 4

The size of short 2

The size of long 8

The size of float 4

The size of double 8

The size of long double 8

The size of char 1