find("World"); // 查找子字符串 "World" if (pos != std::string::npos) { std::string sub_str = str.substr(pos, 5); // 从找到的位置开始,截取长度为5的子字符串 std::cout << "Substring: " << sub_str << std::endl; // 输出 "World" } else { std::...
substr(start, length): 从给定位置开始提取指定长度的子字符串。 find(substring): 查找子字符串的第一个出现位置。 rfind(substring): 从字符串末尾开始查找子字符串的第一个出现位置。 字符串比较: compare(str): 按字典顺序比较两个字符串。 ==,!=,<,>,<=,>=等运算符:用于比较两个字符串。 字符串替...
find(a, curpos); if (pos == string::npos) { pos = line.length(); } subline.push_back(line.substr(curpos, pos - curpos)); pos++; } return; } //根据空截断字符串 void ChopStringLineEx(string line, vector<string> &substring) { stringstream linestream(line); string sub; while (...
在CMake中,我们可以使用string(FIND <string> <substring> [<start>])函数来查找一个字符串在另一个字符串中的位置。这在处理文件路径或者其他需要查找的场景中非常有用。 例如,我们可以通过查找文件路径中的某个子路径,来判断一个文件是否在某个目录下。 以上就是在项目构建中如何使用CMake String的一些实际应...
substring (2) string& insert (size_t pos, const string& str, size_t subpos, size_t sublen); c-string (3) string& insert (size_t pos, const char* s); buffer (4) string& insert (size_t pos, const char* s, size_t n); fill (5) string& insert (size_t pos, size_t n,...
if(strstr(string,subString))// for char array{ cout <<"ok!"; } 1 2 3 4 if(string.find(subString))// for string{ cout <<"ok!"; } Last edited onMar 8, 2015 at 3:43pm Mar 9, 2015 at 12:04am dhayden(5799) Note: You may not use any c-string functions other than strlen...
string text = "This is a sample text.";size_t found = text.find("sample"); // 查找子字符串if (found != string::npos) { cout << "Substring found at position " << found << endl;} else { cout << "Substring not found." << endl;} cout << "Substring not found." ...
"; //可使用 empty() 方法对string类型的对象进行判空 if (str.empty()) { cout << "str is empty." << endl; } std::cout << "Length: " << str.length() << std::endl; std::cout << "Substring: " << str.substr(7, 5) << std::endl; str.append("!"); std::cout << "...
A string object with a substring of this object.Example 12345678910111213141516171819 // string::substr #include <iostream> #include <string> int main () { std::string str="We think in generalities, but we live in details."; // (quoting Alfred N. Whitehead) std::string str2 = str.subst...
std::string::size_type found = s.find(stringtofind);if(found != std::string::npos) { std::cout <<"Substring found at position: "<< found; }else{ std::cout <<"The substring is not found."; } } Here we have the main string and a substring we want to find. We supply the ...