The program alone won't help you much. But you can get a complete environment from either https://arnoldtrembley.com/GnuCOBOL.htm providing the project's official MinGW binaries (those are 32bit) or use the snapshot from the CI buid, either as a MinGW package (similar to Arnold's, not so polished yet, but more current). If you don't want to use MinGW/GCC based builds you'd need to compile and test with the matching compiler on your own.
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Where can I get a copy of the 32-bit COBC.EXE program?
The program alone won't help you much. But you can get a complete environment from either https://arnoldtrembley.com/GnuCOBOL.htm providing the project's official MinGW binaries (those are 32bit) or use the snapshot from the CI buid, either as a MinGW package (similar to Arnold's, not so polished yet, but more current). If you don't want to use MinGW/GCC based builds you'd need to compile and test with the matching compiler on your own.