Predict the output or
error(s) for the following:
52. int i,j;
Runtime error: Abnormal program termination.
assert failed (i<5), ,
asserts are used during debugging to make sure that certain conditions are
satisfied. If assertion fails, the program will terminate reporting the same.
After debugging use,
and this will disable all the assertions from the source code. Assertion
is a good debugging tool to make use of.
%d, +i = %d \n",i,+i);
i = -1, +i = -1
Unary + is the only dummy operator in C. Where-ever it comes you can just ignore
it just because it has no effect in the expressions (hence the name dummy
54. What are the files which are automatically opened
when a C file is executed?
stdin, stdout, stderr (standard input,standard output,standard error).
55. what will be the position of the file
SEEK_SET sets the file position marker to the starting of the file.
b: The SEEK_CUR sets the file position marker to the current position
of the file.
First it checks for the leading white space and discards it.Then it matches with
a quotation mark and then it reads all character upto another quotation
57. What is the
problem with the following code segment?
array,50,file_ptr)) != EOF)
Answer & Explanation:
fgets returns a pointer. So the correct end of file check is checking for !=
Runtime error : Stack overflow.
main function calls itself again and again. Each time the function is called its
return address is stored in the call stack. Since there is no condition to
terminate the function call, the call stack overflows at runtime. So it
terminates the program and results in an error.
Compiler error (at line number 4): size of v is Unknown.
You can create a variable of type void * but not of type void, since void is an
empty type. In the second line you are creating variable vptr of type void * and
v of type void hence an error.
2 5 5
In first sizeof, str1 is a character pointer so it gives you the size of the
pointer variable. In second sizeof the name str2 indicates the name of the array
whose size is 5 (including the '\0' termination character). The third sizeof is
similar to the second one.
! is a logical operator. In C the value 0 is considered to be the boolean value
FALSE, and any non-zero value is considered to be the boolean value TRUE. Here 2
is a non-zero value so TRUE. !TRUE is FALSE (0) so it prints 0.
62. #define FALSE
The input program to the compiler after processing by the preprocessor is,
Preprocessor doesn't replace the values given inside the double quotes. The
check by if condition is boolean value false so it goes to else. In second if -1
is boolean value true hence "TRUE" is printed.
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