F77_MISTAKE, FORTRAN77 programs which illustrate some simple but devious programming mistakes in FORTRAN77.
The computer code and data files made available on this web page are distributed under the GNU LGPL license.
C_MISTAKE is available in a C version and a FORTRAN90 version and an HTML version and a MATLAB version and a Python version.
You can go up one level to the FORTRAN77 source codes.