习题9.34 9.35 string中的iterator

#include<iostream>
#include<string>
using namespace std;

int main()
{
	//转换大写字符
	/*string str = "hello world!";
	for(string::iterator it=str.begin();it!=str.end();it++)
	{
		*it = toupper(*it);
	}
	cout<<str;*/

	//删除大写字符
	string str = "hello WwoRRlIId!";
	for(string::iterator it=str.begin();it!=str.end();it++)
	{
		if(isupper(*it))
		{
			str.erase(it);
			--it;
		}
	}
	cout<<str;
}