Cross-Platform Code

1#include <fstream>
2#include <iostream>
3
4int main() {
5  //  Windows style
6  std::ifstream file("data\\config.txt"); 
7
8  // Works everywhere
9  std::ifstream file2("data/config.txt"); 
10}

1#include <iostream>
2using namespace std;
3
4int main() {
5  cout << "Line 1\n";   // Works everywhere 
6  cout << "Line 2\r\n"; // Windows-specific 
7}

1#include <iostream>
2
3int main() {
4  //  Windows only - clears screen
5  system("cls");    
6
7  //  Unix only - clears screen
8  system("clear");  
9
10  // Instead, use portable solutions:
11  std::cout << "Press Enter to continue...";
12  std::cin.get();  // Works everywhere 
13}

1#include <iostream>
2#include <string>
3
4int main() {
5  std::string name;
6  std::cout << "Enter name: ";
7
8  // Works everywhere
9  std::getline(std::cin, name); 
10}

1// Standard C++ - works everywhere
2#include <iostream> 
3
4// Windows-specific - avoid unless necessary
5#include <windows.h>

1#include <iostream>
2
3int main() {
4#ifdef _WIN32
5  // Windows-specific code here
6#elif __APPLE__
7  // Mac-specific code here
8#elif __linux__
9  // Linux-specific code here
10#else
11  // Default code here
12#endif
13  std::cout << "This code runs everywhere!\n";
14}