Conversion of String Equation to Integer not working

Question

I just started learning C++ and I had a problem with converting a string operations into an integer. Id like some tips on code as well. Thanks in advance! :)

https://code.sololearn.com/cm0110Y9r091/?ref=app

Answer 1

atoi doesn't perform operation. It only converts the string to int. If you do atoi("9 - 7"); It returns 9 because the character after 9 is not a valid digit.

A side notes:
Don't use atoi. In C++ there is std::stoi which takes an std::string. You won't need to convert the string to char array with stoi. (stoi still doesn't perform operation though)

You either do using namespace std or write std:: manually. I don't see the purpose of 4 usings here.

Instead of changing "1 character", with replace, just use str[pos] = '+'.

Answer 2

CarrieForle Thanks for the input, im gonna try a different approach to this problem :)