1. What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used? The strcpy() function is designed to work exclusively with strings. …
9. Is using exit() the same as using return? No. The exit() function is used to exit your program and return control to the operating system. The return statement is …
5. Should a function contain a return statement if it does not return a value? In C, void functions (those that do not return a value to the calling function) …
1. When should I declare a function? Functions that are used only in the current source file should be declared as static, and the function’s declaration should appear in the …
9. How do you list a file’s date and time? A file’s date and time are stored in the find_t structure returned from the _dos_findfirst() and_dos_findnext() functions. The date and …
5. Can stdout be forced to print somewhere other than the screen? Although the stdout standard stream defaults to the screen, you can force it to print to another device …
1. If errno contains a nonzero number, is there an error? The global variable errno is used by many standard C library functions to pass back to your program an …
9. Is it better to use a macro or a function? The answer depends on the situation you are writing code for. Macros have the distinct advantage of being more …
5. What is the benefit of using #define to declare a constant? Using the #define method of declaring a constant enables you to declare a constant in one place and …
1. What is a macro, and how do you use it? A macro is a preprocessor directive that provides a mechanism for token replacement in your source code. Macros are …
