set precision in c 2b 2b

1#include<iomanip>
2#include <iostream>
3using namespace std;
4
5int main()
6{
7   int num = 45;
8  cout << "it is: " << fixed << setprecision(2) << num << " the end"<< endl;
9  
10  return 0;
11}
12

1int x = 109887;
2cout << fixed << setprecision(3) << x;

1#include <iomanip.h>
2#include <iomanip>
3int main()
4{
5    double num1 = 3.12345678;
6    cout << fixed << showpoint;
7    cout << setprecision(2);
8    cout << num1 << endl;
9}
10

1#include<iostream>
2#include<iomanip>
3using namespace std;
4int main()
5{
6  int i = 18;
7  cout<<setw(10)i;
8}