string字符串的查找与替换
代码语言：javascript
复制#include<iostream>
using namespace std;
//string字符串的查找与替换
void test()
{
string s1 = "abc dhy defg";
//查找：
//find
int ret = s1.find("dhy");
if (ret == -1)
{
cout << "查到个der" << endl;
}
else{
cout << "ret=" << ret << endl;
}
//rfind
int result = s1.rfind("dhy");
if (result == -1)
{
cout << "查到个der呀！！！" << endl;
}
else {
cout << "result=" << ret << endl;
}
//注意find和rfind的区别：find从左往右查找，rfind从右往左查找，都返回字符串从左往右开始第一个下标位置
//查找不到都返回-1
//替换：
//replace 将abc替换成了ly
s1.replace(0, 3, "ly");
cout << s1 << endl;
}
int main()
{
test();
system("pause");
return 0;
}
