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how to change a string to an float in c++

By GRUMMGRUMM on Aug 27, 2020 
#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;
}

Source: www.programiz.com

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c++ std string to float

By Av3Av3 on Feb 27, 2021 
std::string num = "0.6";
double temp = ::atof(num.c_str());

std::cout << temp << std::endl;
// Output: 0.6

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