DAY05
Wednesday, 23 May 2012

• complex_numbers.c, the book says that the gcc compiler can't handle complex numbers, but that's no longer true. Here's a simple program that suggests how it's done.
• earth_division.c, a program which estimates how much land we could evenly allocate every person on the earth. It needs to compute a square root.
• hello.c, the C source for the hello program.
• hello_e.c, the result of the "gcc -E hello.c" command (preprocess only).
• hello.s, the result of the "gcc -S hello.c" command (preprocess and compile into assembly language only).
• hello.o, the result of the "gcc -c hello.c" command (preprocess, compile into assembly language, and create machine language).
• hello, the result of the "gcc -o hello hello.c" command (preprocess/compile/machine/link, plus rename to "hello"). This program is executable (but only on the machine where it was compiled.)
• my_sqrt.c, a function (not a program!) which we will try to use as a replacement for the C sqrt() function.
• prime.c, a simple program which tries to figure out whether a number is prime; it demonstrates the BOOL datatype, the use of the MODULUS operator "%", and the fact that multiplication and division are carried out left to right, so that sometimes you need parentheses to get what you really want. Also, we have a sneak peek at the FOR loop, and at the mysterious "i++" operator.
• square_root.c, a simple program to compute the square root of a number;
• square_root2.c, a more complicated version of the square root program;