how print fload wiht 2 decimal in c 2b 2b

1#include <iostream>
2#include <cstdio>
3using namespace std;
4
5int main() 
6{
7    // This code helps you to print a number with desired decimal
8    double Number=10.3454;
9    printf("%.3lf",Number);
10
11    return 0;
12}

1#include <iostream>
2#include <iomanip>
3using namespace std;
4
5int main()
6{
7	float x=10.3445f;
8	
9	cout<<fixed<<setprecision(5)<<x<<endl;
10	cout<<fixed<<setprecision(2)<<x<<endl;
11	cout<<fixed<<setprecision(3)<<x<<endl;
12	cout<<fixed<<setprecision(0)<<x<<endl;
13	
14	return 0;
15}
16