c语言中sizeof运算符，输出不同数据类型的长度

c语言中sizeof运算符，输出不同数据类型的长度

1、

a、sizeof运算符的符号是字节

b、各种数据类型的有符号型和无符号型长度一致

c、一般情况 short <= int <= long。

#include <stdio.h>

int main(void)
{
    puts("show the length.");
    
    printf("sizeof(char)         = %u\n", (unsigned)sizeof(char));
    printf("sizeof(short)        = %u\n", (unsigned)sizeof(short));
    printf("sizeof(int)          = %u\n", (unsigned)sizeof(int));
    printf("sizeof(long)         = %u\n", (unsigned)sizeof(long));
    
    return 0;
}