CS256 - Fundamentals of Structured Programming

Displaying exercises/e6/solution/p1.c

#include <stdio.h>

/**
 * Print "Hello, world!" preceded by a number that is right aligned to three
 * spaces and ranges from 1 to 100 in steps of 9.  You must use a loop for this
 * problem. The number should be right aligned to 3 columns. To right align
 * numbers, use %#d in your printf, where # is the number of columns you want.
 * Example output:
 *   1 Hello, world!
 *  10 Hello, world!
 *  19 Hello, world!
 *  28 Hello, world!
 *  ...
 * 100 Hello, world!
 */

int main(void)
{
  int line;
  int lower, upper, step;

  // Values in variables to make the code more readble:
  lower = 1;
  upper = 100;
  step = 9;

  // Start counting at the lower end value:
  line = lower;
  // While the line hasn't reached the upper value, loop:
  while (line <= upper) {
    printf("%3d Hello, world!\n", line);
    // Increase the line number by the step value:
    line = line + step;
  }

  return 0;
}