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The idea of this code is simple: Make sure that size is not too large by limiting it to MAX. But that's now what we do.
1 /************************************************
2 * Test the logic to limit the size of a *
3 * variable. *
4 ************************************************/
5 #include <iostream>
6
7 int main()
8 {
9 int size = 20; // Size to be limited
10 const int MAX = 25; // The limit
11
12 if (size > MAX)
13 std::cout << "Size is too large\n";
14 size = MAX;
15
16 std::cout << "Size is " << size << '\n';
17 return(0);
18 }
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The UNIX command true does nothing. Actually the first version of the program was a 0 line batch file (UNIX calls them shell scripts). Over the years various pieces of source control nonsense and other junk were added to it, until the 0 line program grew till it looked like:
#! /bin/sh
#
# @(#)true.sh 1.5 88/02/07 SMI; from UCB
#
exit 0
The 1.5 is a version number. It means that they had to go through four previous versions of the program before they came up with this one. Why they had to reinvent a null program four times is beyond me.
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