C++ Programming Tutorial

Variables and Data Types

C++ has built-in types (`int`, `double`, `char`, `bool`) and standard types like `std::string`. Use `const` for values that should not change and `auto` to let the compiler infer types.

#include \n#include \n\nint main() {\n    int a = 10;\n    double b = 3.14;\n    char c = 'Z';\n    bool ok = true;\n    const std::string name = "Ada";\n    auto ratio = b / a; // inferred double\n\n    std::cout << a << " " << b << " " << c << " " << ok << " " << name << " " << ratio << std::endl;\n    return 0;\n}

Tips

• Prefer `std::string` over C-style strings for safety.
• Use `const` to prevent accidental modification.
• `auto` helps reduce verbosity but keep readability in mind.