C代码中如何获取变量的类型

获取变量的类型是在编程中经常用到的操作之一。在C语言中，我们可以通过使用内置的关键字和函数来获取变量的类型。在本文中，我们将介绍一些常用的方法来获取变量的类型，并提供一些示例代码来帮助理解。

c
#include 
int main() {
    int num = 10;
    float pi = 3.14;
    char letter = 'A';
    printf("Size of num: %lu bytes\n", sizeof(num));
    printf("Size of pi: %lu bytes\n", sizeof(pi));
    printf("Size of letter: %lu bytes\n", sizeof(letter));
    return 0;
}

c
#include 
int main() {
    int num = 10;
    float pi = 3.14;
    char letter = 'A';
    typeof(num) numType;
    typeof(pi) piType;
    typeof(letter) letterType;
    printf("Type of num: %s\n", typeof(numType));
    printf("Type of pi: %s\n", typeof(piType));
    printf("Type of letter: %s\n", typeof(letterType));
    return 0;
}

c
#include 
#define getType(var) _Generic((var), \
    int: "int", \
    float: "float", \
    char: "char" \
)
int main() {
    int num = 10;
    float pi = 3.14;
    char letter = 'A';
    printf("Type of num: %s\n", getType(num));
    printf("Type of pi: %s\n", getType(pi));
    printf("Type of letter: %s\n", getType(letter));
    return 0;
}