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C Language > Learn C Language > How are portions of a program disabled in demo versions...
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How are portions of a program disabled in demo versions?

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By making them comments. This can be achieved by using // sign before the line or by surrounding multiple lines in within /*...lines of comment...*/
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By inserting comments in the program Single line comment denoted by // Multi line comment denoted by /* */
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Just put the code/features which should not go into demo in #ifndef block example: #ifndef _DEMO_ Code/features which shouldn't go in demo mode #endif And while compiling set or remove the _DEMO_ flag based on the build you are making
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Professional trainer Mtech from IIIT hyderabad and Previously with reputed university

Programmers can disable using some flag
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Commenting. // This line is a comment and will not be read by the compiler /* These lines are comments and will not be read by the compiler */
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