Write a C++ program that right justifies text. It should read and echo a sequence of left justified lines and print them in right justified format.

Answer: Read the lines, find the length of the longest line, then print each line after enough leading spaces to make all lines end in the same column.

#include<iostream.h>
#include<conio.h>
#include<string.h>

void main()
{
    char line[5][100];
    int i, j, len, maxlen = 0;
    clrscr();
    cout << "Enter 5 lines of text:" << endl;
    for (i = 0; i < 5; i++)
    {
        cin.getline(line[i], 100, '\n');
        len = strlen(line[i]);
        if (len > maxlen)
            maxlen = len;
    }
    cout << "Left justified (as entered):" << endl;
    for (i = 0; i < 5; i++)
        cout << line[i] << endl;
    cout << "Right justified:" << endl;
    for (i = 0; i < 5; i++)
    {
        len = strlen(line[i]);
        for (j = 1; j <= maxlen - len; j++)
            cout << " ";
        cout << line[i] << endl;
    }
    getch();
}

How it works: the first loop reads each line with cin.getline and keeps track of the longest length maxlen. The lines are then echoed as entered. Finally, each line is printed after maxlen - len spaces, so the last character of every line falls in the same column, which is right justification. (This is Turbo C++ style as in the board syllabus; in standard C++ use <iostream>, <cstring>, int main() and using namespace std;, and drop conio.h.)