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How to determine whether C++ code has been compiled in 32 or 64 bit?
In C++, there is no direct way to check the environment architecture. There are two Macros for Windows systems, that can be used to check the architecture. These macros are _WIN64, and _WIN32. When the system is 64-bit, then the _WIN64 will be 1, otherwise the _WIN32 will be 1. So using macro checking, we can identify the architecture
Example
#include <iostream>
using namespace std;
int main() {
#ifdef _WIN64
cout << "This is 64 bit system" << endl;
#elif _WIN32
cout << "This is 32 bit system" << endl;
#endif
}Output
This is 64 bit system
Updated on 30-Jul-2019 22:30:26
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