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Given the following source programs, write down the letter that correspond to the right answer #include <stdio.h> #ifndef MEM

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Answer #1

How does the preprocessor expand MEM(SIZE, char)?

Answer) Option: A

(char*) malloc( 10*sizeof(char));

Explanation: In the myhead.h header file SIZE is defined as 10 and also in the same header file MEM macro is defined and this MEM(size,type) macro is used in text.c file

how does the preprocessor expand SHOW(text)?

Answer) Option: G

printf("Output: %s\n",x)

Explanation: In the myhead.h header file SHOW(x) is defined and it is used in the text.c file

What is the output of SHOW(text)?

Answer) Option: C

BR151

Explanation: In the myhead.h header file MSG macro is defined as "CS262" and COPY_TEXT(dest,source) macro is defined as strcpy() function of string library. So in text.c file with the use of COPY_TEXT(text,MSG) the string in MSG i.e "CS262" is copied into 'text' and then this 'text' is passed to newtext() function which decreases the ASCII value of each character of 'text' by 1. So the value in 'text' now is BR151 and SHOW(text) will display the value BR151.

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