js_student31 · 09.05.2026

How to convert int to string in C++? Looking for a simple way

Hello everyone! I'm a beginner C++ developer writing a simple product tracking program. I need to display a message like: "Product number 42 added to cart". The problem is that the variable `int itemId = 42;` is an integer, and the string is formed through concatenation. I tried writing like this: ```cpp #include #include int main() { int itemId = 42; std::string message = "Product number " + itemId + " added to cart"; std::cout << message << std::endl; return 0; } ``` But the compiler gives an error: `error: invalid operands of types ‘const char*’ and ‘int’ to binary ‘operator+’`. I understand that C++ cannot automatically add strings and numbers. In Python I just wrote `f"Product number {itemId}"`, and in Java I used `String.valueOf()`. How to do it correctly?

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