Sunday 6 November 2011

Predict the output or error(s) for the following:

 #include<stdio.h>

main()

{

char s[]={'a','b','c','\n','c','\0'};


char *p,*str,*str1;


p=&s[3];


str=p;


str1=s;


printf("%d",++*p + ++*str1-32);


}

Answer:

77


Explanation:

p is pointing to character '\n'. str1 is pointing to character 'a' ++*p. "p is pointing to '\n' and that is incremented by one." the ASCII value of '\n' is 10, which is then incremented to 11. The value of ++*p is 11. ++*str1, str1 is pointing to 'a' that is incremented by 1 and it becomes 'b'. ASCII value of 'b' is 98.


 Now performing (11 + 98 – 32), we get 77("M");


 So we get the output 77 :: "M" (Ascii is 77).

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