http://kor.i2p/books/The%20C%20Programming%20Language%20by%20K&R/chapter1.html
Experiment to find out what happens when prints 's argument string contains \c , where c is
some character not listed above. 1.2 Variables and Arithmetic Expressions The next program uses the formula o C=(5/9)( o F-32) to
print the following table of Fahrenheit temperatures and their centigrade or
Celsius equivalents: 1 -17
20 -6
40 4
60 15
80 26
100 37
120 48
140 60
160 71
180 82
200 93
220 104
240 115
260 126
280 137
300 ...