如果字符串不存在于池中,find方法将返回unordered_set::end。 代码语言:cpp 代码运行次数:0 运行 AI代码解释 if(stringPool.find("Hello, World!")!=stringPool.end()){std::cout<<"String exists in pool.\n";}else{std::cout<<"String does not
int main() { string file("string.cpp.zip"); size_t pos = file.rfind('.'); string suffix = file.substr(pos); cout << suffix << endl; return 0; } 那么为什么我们使用rfind呢?因为有两个.,我们使用find,找到的就是第一个.,所以我们应该倒过来寻找,找到之后久交给substr就可以了。 当然,我们...
int main(){string s1("Test.cpp");string s2("Test.zip");size_t pos1 = s1.find('.');if (pos1 != string::npos){string suff = s1.substr(pos1, s1.size() - pos1);//string suff = s1.substr(pos1);cout << suff << endl;}size_t pos2 = s2.find('.');if (pos2 != str...
int main(){ string str = "Hello"; char c = ' '; //string& operator+=(char c); str += c; //string& operator+=(const char* s); str += 'w'; //string& operator++(const string& str); str += "orld"; cout << str << endl; return 0;} 2.4.2 push_back/pop_back int m...
[cpp]view plain copy 1. //string函数用法详解!附代码,写具体的用法! 2. #include <iostream> 3. #include <string> 4. #include <sstream> 5. using namespace std; 6. 7. 8. int main() 9. { 10. //1.string类重载运算符operator>>用于输入,同样重载运算符operator<<用于输出操作 ...
In the example, we access characters of a string. $ ./access l d a C++ string concatenateThe + operator is used to concatenate strings. concat.cpp #include <iostream> using std::string; using std::cin; using std::cout; using std::endl; int main() { string name, msg; cout << "...
PythonList+__init__()+append()+remove()+__getitem__()JavaArray+length+get()+set()CppVector+size()+push_back()+pop_back() 特性拆解 Python字符串数组的创建非常简单,支持动态扩展。通过以下代码实现字符串数组的创建和基本操作。 # 创建一个字符串数组string_array=["apple","banana","cherry"]#...
: “MyString::MyString(const MyString &)”: 因为“MyString”有一个用户定义的 移动赋值运算符,所以已隐式...学习C++的右值引用的时候,发现一个错误1>e:\work\jutiltest\jutiltest\main.cpp(88): error C2280: “MyString智能...
cpp #include <iostream> #include <string> #include <algorithm> std::string removeExtraWhitespace(const std::string& input) { std::string result; bool inWhitespace = false; for (char c : input) { if (std::isspace(c)) { if (!inWhitespace) { result += ' ...
1. What does the pop_back() function do in C++ strings? A. Removes the first character B. Removes the last character C. Adds a character to the end D. Clears the entire string Show Answer 2. What happens if pop_back() is called on an empty string? A. No operation is ...