蒟蒻求助

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string write;
	cin>>write;
	for(int i=0;i<sizeof(write);i++)
	{
		if(write[i]>96&&write[i]<123){
			write[i]=write[i]-32;
		}//如果是小写字母，就转换为大写
		else{
			write[i]=write[i];
		}
	}//循环判定
	for(int j=0;j<sizeof(write);j++)
	{
		cout<<write[j];
	}//循环输出
	return 0;
 }