注意输出空格和保留小数位

#include <bits/stdc++.h>
using namespace std;
char a1;
int a;
float b;
double c;
int main(){
	cin>>a1>>a>>b>>c;
	cout<<a1<<" "<<a<<" "<<fixed<<setprecision(6)<<b<<" "<<c;
	return 0;
}

    
    #include <iostream>
#include <iomanip>

using namespace std;

int main() {
    char c;
    int n;
    float f;
    double d;
    
    cin >> c;
    cin >> n;
    cin >> f;
    cin >> d;
    
    cout << c << " " << n << " " << fixed << setprecision(6) << f << " " << d << endl;
    
    return 0;
}