* Exercise 3

#+BEGIN_SRC C
    #include <stdio.h>

  int main()
    {
      int age = 10;
      int height = 72;

      printf("I am %d years old.\n", age);
      printf("I am %d inches tall.\n", height);

      return 0;
    }
#+END_SRC

#+RESULTS:
| I | am | 10 | years  | old.  |
| I | am | 72 | inches | tall. |

** printf conversion specifiers

+ %%,	Print a single % character
+ %c,	Convert an int to an unsigned character and print the resulting character
+ %d or %i,	Print an int as a signed decimal number
+ %u,	Print an unsigned as an unsigned decimal number
+ %o,	Print an unsigned as an unsigned octal number
+ %x,	Hexadecimal notation (using lowercase letters a-f)
+ %X,	Hexadecimal notation (using uppercase letters A-F)
+ %e,	Exponential notation (using a lowercase e as in 3.1415e+00)
+ %E,	Exponential notation (using an uppercase E as in 3.1415E+00)
+ %f,	Print a double using a decimal format like [-]ddd.ddd
+ %g,	The more compact of %e or %f, insignificant zeros do not print.
+ %G,	Same as g, but using an uppercase E
+ %s,	Print the string pointed to by a char *
+ %p,	Print a void * argument in hexadecimal (ANSI C only)
+ %n,	Store the number of characters printed at this point in the integer pointed to by the int * argument. Nothing is printed. (ANSI C only).

** printf escape sequences

+ \n,	prints a new line
+ \b,	backs up one character
+ \t,	moves the output position to the next tab stop
+ \\,	prints a backslash
+ \",	prints a double quote
+ \',	prints a single quote