String字符串类型

1.添加字符

#include <iostream>
#include <string>


string original = "Hello";
char ch = '!';

original[0]  指"H"

original = original + ch;   将字符添加到原字符串末尾,"Hello!"
original = ch + original;   将字符添加到原字符串首部,"!Hello"

original.push_back('a');  在尾部加入字符."Helloa"
original = original + 'a';  同上

original.insert(s1.begin(),'1');  在字符串首部加入字符1,"1Hello"

   

2.遍历

for( int i = 0; i < s1.size() ; i++ )
{
    cout<<s1[i];
}