Answer Posted / salim

I am going to speak in cotext to c language.
NULL is a macro defined in header files such as
stdio.h,stdlib.h,alloc.h,stddef.h,mem.h.The c pre processor
substitutes NULL by the value 0.Its declaration appears to
be like #define NULL 0 in the standard libraries.It is
used to initialise pointers to 0 and helps in portability.
It is a null pointer constant a convention for programmers
to initialise pointers.It is used mainly with pointer.

0 is simply an integer constant.

/0 is a backslash character contant used to indicate end of
string or a string terminator.

How do I round numbers?

957

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What is string length in c?

1021

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What are the output(s) for the following ? #include char *f() {char *s=malloc(8); strcpy(s,"goodbye")} main() { char *f(); printf("%c",*f()='A'); }

1128

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Is javascript written in c?

1010

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What is return in c programming?

914

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How can you return multiple values from a function?

1047

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What is line in c preprocessor?

991

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What is strcmp in c?

1012

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What is sizeof return in c?

975

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Explain what does it mean when a pointer is used in an if statement?

1000

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#include { printf("Hello"); } how compile time affects when we add additional header file .

1848

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Differentiate abs() function from fabs() function.

956

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stripos — Find position of first occurrence of a case- insensitive string int stripos ( char* haystack, char* needle, int offset ) Returns the numeric position of the first occurrence of needle in the haystack string. Note that the needle may be a string of one or more characters. If needle is not found, stripos() will return -1. The function should not make use of any C library function calls.

2396

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What does s c mean in text?

1053

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What is the difference between printf and scanf in c?

1282

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