C++string赋值操作 string赋值拷贝操作
#include<iostream>#include<string>usingnamespace std;//string& operator=(const char* s); //char* 类型字符串 赋值给当前的字符串//string& operator=(const string& s); //把字符串s赋值给当前的字符串//string& operator=(char c); //字符赋值给当前的字符串//string& assign(const char *s); //吧字符串s赋给当前的字符串//string& assign(const char* s, int n);//把字符串s的前n个字符赋给当前的字符串//string& assign(const string& s); //把字符串s赋给当前字符串//string& assign(int n, char c); //用n个字符c赋给当前字符串voidtest(){
string str1;
str1="hello world!";
cout<<"str1 = "<< str1<< endl;
string str2;
str2= str1;
cout<<"str2 = "<< str2<< endl;
string str3;
str3='a';
cout<<"str3 = "<< str3<< endl;
string str4;
str4.assign("hello C++");
cout<<"str4 = "<< str4<< endl;
string str5;
str5.assign("hello world",5);
cout<<"str5 = "<< str5<< endl;
string str6;
str6.assign(str5);
cout<<"str6 = "<< str6<< endl;
string str7;
str7.assign(5,'x');
cout<<"str7 = "<< str7<< endl;}intmain(){test();return0;}
string的赋值方式很多,operator= 这种方式是比较实用的
C++string赋值操作 string赋值拷贝操作