/*
 * Selftest1
 * Chapter 5
 * John Stile
 */
1. Correct errors in each statemnt if any
    Original:                  Correction:
1a. printf("%s\n", 'hello');   // perfect 
1b. printf("%s\n", &str);      printf("%s\n", str);
1c. printf("%f\n", 3);         printf("%f\n", (float)3);
1d. printf("%c\n", "t");       // perfect 

2. What does the following code accomplish.
   Explain how it works

// When the input is t, it echos t three times, with new line after each
while ( (xx=getchar()) != "t" ) // get a char from input buffer
                                // store in address of variable xx 
                                // test if xx contains the letter t
                                // if true do what is in the while loop
{
  putchar(xx);                  // put letter t in stdout (terminal)
  putchar(xx);                  // put letter t in stdout (terminal)
  putchar(xx);                  // put letter t in stdout (terminal)
}

3. What is the following printf instruction accomplishing?
printf("%-15s%12.3d%10.2f", "C Language", 27, 1.5);
// %-15s  - left justify the string "C Language by 15 spaces, print "C Language"
// %12.3d - right pad with 12 spaces before decimal, use precision of 3 digits, so print "027"
// %10.2f - right pad with 10 spaces before decimal, use precision of 2 digits, so print "1.50"

4. Write a short program wich outputs the following text using printf:
      How do you print %d, %f, %s "as they are"?

/*
 * program to print: How do you print %d, %f, %s "as they are"?
 */
#include <stdio.h>
int main(void)
{
  printf("How do you print %%d, %%f, %%s \"as they are\"\?\n");
  return 0;
}