[C++]将float保留2位小数并转成std::string

#include <iostream>

#include <sstream>

#include <iomanip>

std::string float2string(float value) {

std::ostringstream streamObj;

// Set Fixed -Point Notation

streamObj << std::fixed;

// Set precision to 2 digits

streamObj << std::setprecision(2);

//Add double to stream

streamObj << value;

// Get string from output string stream

return streamObj.str();

}

int main() {

float value = 3.14159;

std::string valueAsString = float2string(value);

std::cout << valueAsString << std::endl; // Prints "3.14"

return 0;

}