Summary

This topic provides a summary of the key points described in this section.

• C is case sensitive.
• Parameters should be BYVALUE.
• Return values should be BYVALUE.
• String parameters should be BYADDR.
• Arrays and structures should also be BYADDR.
• No descriptors should be passed.
• Input-only strings should be NONASSIGNABLE.
• C function pointers map to LIMITED ENTRYs.
• The IBM® C compilers and the IBM PL/I compilers use the same default linkage (and it matters).