C++ x86程序与x64程序中,各种内置类型的大小比较

代码:

#include <iostream>
#include <cstdio>
#include <list>
#include <string>
#include <cstdint>
#include <exception>

#define PRINT_SIZE(type) printf("%-17s = %zu,inner type: %s
", "sizeof("#type")", sizeof(type), typeid(type).name())

void print_sys_bits()
{
#ifdef _WIN64
    std::cout << "x64:" << std::endl;
#else
    std::cout << "x86:" << std::endl;
#endif
}

void print_sizes()
{
    PRINT_SIZE(void*);
    PRINT_SIZE(float);
    PRINT_SIZE(double);
    PRINT_SIZE(short);
    PRINT_SIZE(int);
    PRINT_SIZE(long);
    PRINT_SIZE(long long);
    PRINT_SIZE(int8_t);
    PRINT_SIZE(uint8_t);
    PRINT_SIZE(int16_t);
    PRINT_SIZE(uint16_t);
    PRINT_SIZE(int32_t);
    PRINT_SIZE(uint32_t);
    PRINT_SIZE(int64_t);
    PRINT_SIZE(uint64_t);
}

int32_t main()
{
    print_sys_bits();
    print_sizes();
    std::cin.get();
    return 0;
}

在不同的开发环境中,分别编译出x86程序和x64程序,观察执行结果

环境: Win10_64位 + VS2015_32位

在上面的结果中,除了指针的size不一样之外,其它的内置类型是完全相同的.