【上交ACM—語法基礎】String型別--花式String操作
阿新 • • 發佈:2022-04-13
程式碼例子:
#include <iostream> #include <cstring> #include <string> using namespace std; int main() { string s1("LaoWang"); string s2 = "Liu"; // 如果感興趣,可以在下方實現左邊表格裡string型別的花式操作,加深印象 //常用功能 s1.assign(s2); cout << s1 << endl; s1.append(s2); cout << s1 << endl; cout << "s1 - s2 = " << s1.compare(s2) << endl; cout << "s1(1, 4): " << s1.substr(0, 3) << endl; //訪問元素 cout << s1[0] << s1.at(1); s1.at(2) = 'a'; cout << "第一個字元" << s1.front() << endl; cout << "最後一個字元" << s1.back() << endl; //string與char相互轉換 char arr[8]; string s = "LaoWang"; //-------.copy(char_arr, len, pos)函式返回copy的len值 int len = s.copy(arr, 7); arr[len] = '\0'; cout << arr << " " << s << endl; //-------.c_str函式和data函式 char arr1[8]; string s6 = "LaoWang"; strcpy(arr1, s6.c_str()); //增刪改查換 string s3 = "LaoWang"; s3.insert(3, "123"); string s4 = "LaoWang"; s4.erase(3, 1); cout << s4 << endl; int x = s1.find('L', 3); int y = s1.rfind('L', 3); cout << x << " " << y << endl; return 0; s1.push_back('1'); cout << s1 << endl; s1.pop_back(); cout << s1 << endl; s1.replace(3, 2, "123"); cout << s1; }