Convert String To Float C++ Stringstream Code Example

Example 1: how to change a string to an float in c++

#include <iostream> #include <string>  int main() {     std::string str = "123.4567";      // convert string to float     float num_float = std::stof(str);      // convert string to double     double num_double = std::stod(str);     std:: cout<< "num_float = " << num_float << std::endl;    std:: cout<< "num_double = " << num_double << std::endl;      return 0; }

Example 2: c++ std string to float

std::string num = "0.6"; double temp = ::atof(num.c_str());  std::cout << temp << std::endl; // Output: 0.6