C++ 文字显示

//cool text display thing
//delay format: 1*delay (seconds)
#include<bits/stdc++.h>
using namespace std;
void displaytext(string t,double delay,bool end){
	int i=0;
	while (t[i]!='\0'){
		cout<<t[i];
		usleep(1000000*delay);
		i++;
	}
	if(end)cout<<endl;
}
int main(){
	displaytext("hello world",0.1,true);
	displaytext(to_string(69),0.05,false);
	return 0;
}