[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; }