string字符串的字符存取
代码语言：javascript
复制#include<iostream>
using namespace std;
//string字符串的字符存取
void test()
{
string s = "dhy";
//[]读取字符
//s.size(); 字符串s的大小
//s.empty()；判断字符串s是否为空
for (int i = 0; i < s.size(); i )
{
cout << s[i] << " ";
}
cout << endl;
//at读取字符
for (int i = 0; i < s.size(); i )
{
cout << s.at(i) << " ";
}
cout << endl;
//[]修改字符
s[0] = 'x';
for (int i = 0; i < s.size(); i )
{
cout << s[i] << " ";
}
cout << endl;
//at修改字符
s.at(0) = 'c';
for (int i = 0; i < s.size(); i )
{
cout << s[i] << " ";
}
cout << endl;
}
int main()
{
test();
system("pause");
return 0;
}
