#include<iostream>#include<string>intmain(){intintValue =42;doubledoubleValue =3.14159; std::string intStr = std::to_string(intValue); std::string doubleStr = std::to_string(doubleValue); std::cout <<"Integer to string: "<< intStr << std::endl; std::cout <<"Double to string: ...
方法1:std::to_string(C++11及以上) 这是最简单的方法之一,直接使用std::to_string。 #include<iostream>#include<string>intmain(){floatnum =123.456f; std::string str = std::to_string(num); std::cout <<"Converted string: "<< str << std::endl;return0; } 输出 Convertedstring:123.456001 ...
std::string str = ss.str(); std::cout << str << std::endl; // new method std::string pi = "pi is" + std::to_string(3.1415926); std::string perfect = std::to_string(1 + 2 + 4 + 7 + 14) + "is a perfect number"; std::cout << pi << std::endl; std::cout <<...
问将std::ostream转换为std::stringEN#include <string>#include <locale>#include <codecvt>// conver...
end(); ++it) { cout << *it << " "; } 五、总结 std::string 类型极大地简化了C++中的字符串处理,提供了丰富的成员函数来执行各种操作。正确理解和使用这些功能,可以有效避免常见的错误和性能问题。记住,合理利用其高级特性,如内存预分配和迭代器,可以进一步提升代码的效率和可读性。在编写涉及字符串操作...
int main() { std::string str; std::vector<std::string> list; list.push_back("hello"); list.push_back("world"); str = accumulate(list.begin(), list.end(), str); std::cout<<str.c_str()<<std::endl; } // 输出 helloworld...
使用std::to_string函数可以将整数转换为字符串。这个函数是C++11引入的,所以确保你的编译器支持C++11或更高版本。 编写代码示例: cpp #include <iostream> #include <string> int main() { int num = 123; std::string str = std::to_string(num); std::cout << "The intege...
#include<charconv> // from_char, to_char#include<string>#include<iostream>intmain(){conststd::stringstr{"12345678901234"};intvalue=0;constautores=std::from_chars(str.data(),str.data()+str.size(),value);if(res.ec==std::errc()){std::cout<<"value: "<<value<<", distance: "<<res...
#include"iostream"using namespace std;#include"string"#include"algorithm"intmain(){string s1="Tom And Jerry";// 将字符串转为大写字母transform(s1.begin(),s1.end(),s1.begin(),toupper);// 打印 s1值cout<<"s1 = "<<s1<<endl;// 将字符串转为小写字母transform(s1.begin(),s1.end(),s1....