Change width as you output : int display « Data Types « C++ Tutorial

#include <iostream>
#include <iomanip>
using namespace std; 
int main(void){
   cout << setw(5) << 1 << '\n' << setw(6) << 2; 
   cout << '\n' << setw(7) << 3;
}

2.5.int display
	2.5.1.	Displaying Leading Zeros
	2.5.2.	Change width as you output
	2.5.3.	setiosflags(ios::left) and resetiosflags(ios::left)
	2.5.4.	Line up columns of data with cout.width
	2.5.5.	Using various padding characters
	2.5.6.	Output decimal to hexadecimal, octal and align the output
	2.5.7.	Set cout for hex number output