C++如何获取系统内存信息_C++ 系统内存信息获取方法

#include <iostream>
#include <windows.h>
<p>int main() {
MEMORYSTATUSEX memInfo;
memInfo.dwLength = sizeof(MEMORYSTATUSEX);</p><pre class="brush:php;toolbar:false;"><pre class="brush:php;toolbar:false;">if (GlobalMemoryStatusEx(&memInfo)) {
    DWORDLONG totalMem = memInfo.ullTotalPhys / (1024 * 1024); // 单位：MB
    DWORDLONG freeMem = memInfo.ullAvailPhys / (1024 * 1024);
    DWORDLONG usedMem = totalMem - freeMem;

    std::wcout << L"总内存: " << totalMem << L" MB\n";
    std::wcout << L"可用内存: " << freeMem << L" MB\n";
    std::wcout << L"已用内存: " << usedMem << L" MB\n";
} else {
    std::cerr << "无法获取内存信息。\n";
}

return 0;

#include <iostream>
#include <fstream>
#include <string>
<p>int main() {
std::ifstream memFile("/proc/meminfo");
std::string line;
long totalMem = 0, freeMem = 0, buffers = 0, cached = 0;</p><pre class="brush:php;toolbar:false;"><pre class="brush:php;toolbar:false;">while (std::getline(memFile, line)) {
    if (line.find("MemTotal") != std::string::npos) {
        totalMem = std::stol(line.substr(line.find(':') + 1));
    }
    else if (line.find("MemFree") != std::string::npos) {
        freeMem = std::stol(line.substr(line.find(':') + 1));
    }
    else if (line.find("Buffers") != std::string::npos) {
        buffers = std::stol(line.substr(line.find(':') + 1));
    }
    else if (line.find("Cached") != std::string::npos) {
        cached = std::stol(line.substr(line.find(':') + 1));
    }
}

memFile.close();

long usedMem = totalMem - freeMem - buffers - cached;

std::cout << "总内存: " << totalMem / 1024 << " MB\n";
std::cout << "可用内存: " << freeMem / 1024 << " MB\n";
std::cout << "已用内存: " << usedMem / 1024 << " MB\n";

return 0;

#ifdef _WIN32
    // Windows逻辑
#elif __linux__
    // Linux逻辑
#endif