I/O Manipulation Header

0x00 IOManip Usage

#include <iomanip.h>

0x00 Methods

Set Width

setw(n)

Case Study

Output 10 chars, filling in blank ones with spaces.

#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    string n;
    cin >> n;
    cout << left << setw(10) << n << endl;
    return 0;
}

Case Study

Pretty-printing datetime:

#include <iostream>
#include <iomanip>
#include <cstring>
using namespace std;

int main() {
    int y, m, d;
    cin << y << m << d;
    cout << y << '-' << setw(2) << m << '-' << setw(2) << d;
}

Set Fill

setfill(n);

Case Study

Output 10 chars, filling in blank ones with dashes.

#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    string n;
    cin >> n;
    cout << setfill('-') << setw(10)<< n << endl;
    return 0;
}