#include <stdio.h>

int main() {
    printf("the size of 'char': %d Byte\n", sizeof(char));
    printf("the size of 'short int': %d Byte\n", sizeof(short int));
    printf("the size of 'int': %d Byte\n", sizeof(int));
    printf("the size of 'unsigned int': %d Byte\n", sizeof(unsigned int));
    printf("the size of 'float': %d Byte\n", sizeof(float));
    printf("the size of 'double': %d Byte\n", sizeof(double));
    printf("the size of 'long': %d Byte\n", sizeof(long));
    printf("the size of 'long long': %d Byte\n", sizeof(long long));
    printf("the size of 'unsigned long': %d Byte\n", sizeof(unsigned long));
    printf("the size of 'void*': %d Byte\n", sizeof(void*));
    return 0;
}

在64位Linux(Debian)系统下编译此程序:

1. 编译为64位程序
   gcc type_szie.c -o type_size_64.out
   结果如下所示:
   

2. 编译为32位程序

• 安装编译32位程序所需的软件包
  sudo apt install build-essential module-assistant gcc-multilib g++-multilib
• 编译
  gcc -m32 type_szie.c -o type_size_32.out
  结果如下所示:
  

3. 分析
   32位的寻址空间是\(2^{32}\), 即32个bit, 也就是4个字节. 同理64位编译器.

参考博客:

1. https://www.cnblogs.com/l199616j/p/10401094.html
2. https://blog.csdn.net/longintchar/article/details/50557832