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在C++中,std::to_string()
函數(shù)是一種非常方便的將數(shù)字類(lèi)型(如int、float、double等)轉(zhuǎn)換為字符串的方法
#include<iostream>
#include<string>
std::to_string()
函數(shù)將整數(shù)轉(zhuǎn)換為字符串:int num = 42;
std::string num_str = std::to_string(num);
std::cout << "Integer to string: "<< num_str<< std::endl;
std::to_string()
函數(shù)將浮點(diǎn)數(shù)轉(zhuǎn)換為字符串:float float_num = 3.14f;
std::string float_num_str = std::to_string(float_num);
std::cout << "Float to string: "<< float_num_str<< std::endl;
std::to_string()
函數(shù)將雙精度浮點(diǎn)數(shù)轉(zhuǎn)換為字符串:double double_num = 3.141592653589793;
std::string double_num_str = std::to_string(double_num);
std::cout << "Double to string: "<< double_num_str<< std::endl;
完整示例代碼:
#include<iostream>
#include<string>
int main() {
int num = 42;
std::string num_str = std::to_string(num);
std::cout << "Integer to string: "<< num_str<< std::endl;
float float_num = 3.14f;
std::string float_num_str = std::to_string(float_num);
std::cout << "Float to string: "<< float_num_str<< std::endl;
double double_num = 3.141592653589793;
std::string double_num_str = std::to_string(double_num);
std::cout << "Double to string: "<< double_num_str<< std::endl;
return 0;
}
輸出結(jié)果:
Integer to string: 42
Float to string: 3.14
Double to string: 3.14159
注意:std::to_string()
函數(shù)對(duì)于浮點(diǎn)數(shù)和雙精度浮點(diǎn)數(shù)的轉(zhuǎn)換可能會(huì)有精度損失。如果需要更高的精度,可以考慮使用其他庫(kù),如Boost或者自定義格式化函數(shù)。
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