C++主要类型的长度（32位与64位系统比较）(转载)

1、源代码
#include <iostream>
 
using namespace std;
 
int main(int argc, const char * argv[])
{
    cout << "sizeof(char) =      " << sizeof(char) << endl;
    cout << "sizeof(short) =     " << sizeof(short) << endl;
    cout << "sizeof(int) =       " << sizeof(int) << endl;
    cout << "sizeof(float) =     " << sizeof(float) << endl;
    cout << "sizeof(long) =      " << sizeof(long) << endl;
    cout << "sizeof(void *) =    " << sizeof(void *) << endl;
    cout << "sizeof(long long) = " << sizeof(long long) << endl;
    cout << "sizeof(double) =    " << sizeof(double) << endl;
 
    return 0;
}
2、32位系统
macos系统（版本号：10.13.2）
编译器：clang++
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.3.0）

编译选项：-arch i386
sizeof(char) =      1
sizeof(short) =     2
sizeof(int) =       4
sizeof(float) =     4
sizeof(long) =      4
sizeof(void *) =    4
sizeof(long long) = 8
sizeof(double) =    8
3、64位系统
macos系统（版本号：10.13.2）
编译器：clang++
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.3.0）

编译选项：-arch x86_64
sizeof(char) =      1
sizeof(short) =     2
sizeof(int) =       4
sizeof(float) =     4
sizeof(long) =      8
sizeof(void *) =    8
sizeof(long long) = 8
sizeof(double) =    8

4、长度对比表

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作者：太行一粟 
来源：CSDN 
原文：https://blog.csdn.net/weixin_41103006/article/details/78998463 
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