#define min((a),(b)) ((a)<(b))?(a):(b)
main()
{
int i=0,a[20],*ptr;
ptr=a;
while(min(ptr++,&a[9])<&a[8]) i=i+1;
printf("i=%d\n",i);}
Answer Posted / vignesh1988i
here the value will be 3.
EXPLANATION:
here the #define macros will blindly substitute the values
in the while loop before compailation.. then when it compails...
1)we will have the expanded macros like this:
while((ptr++<&a[9]?ptr++:&a[9])<&a[8])
i++;
hrer when the loop runs for the first time ptr will
increment by 2 since it is a integer type, which allocates 2
bytes.
first see the layout:
10 12 14 16 18 20 22 24 26 28 30 .....
| | | | | | | | | | | |
0 1 2 3 4 5 6 7 8 9 10 ....
0,1,2,3 represents index values...
10,12,14 represents addresses....
so the ptr variable will have the base address of array a.
when comin to while loop, it gets incremented to the next
location , address is 12,and go and check wit the address of
&a[9] in our case it is 28. so naturally it wil become true
so it executes the statement after ? symbol.. again in that
ptr++ is given so again ptr will be incremented to 14.. so
14 will be compared with &a[8] ,likely to be 26. it is TRUE
so the whole loop is true ,so i gets incremented so i=1.
next time ptr adds to 16 and then 16<28 and again ptr gets
incremented to 18 and 18<26 and whole while becomes true so
i will become 2.
similarly it will again increments ptr to 20 an dthis
becomes true an ptr again gets incremented to 22 and it
checks whether 22<26! yes, it will increment i to 3.
IMPORTANT:
after that it increments ptr to 24 and executes the
operation after ? operator and again ptr will have 26, this
26 is checked with 26 (&a[8]) the whole while loop becomes
false...
so it wont go to i++, it will printf the printf statement so
i=3.
Is This Answer Correct ? | 3 Yes | 2 No |
Post New Answer View All Answers
in case any function return float value we must declare a) the function must be declared as 'float' in main() as well b) the function automatically returned float values c) function before declared 'float' keyword d) all the above
Why do we write return 0 in c?
Are pointers integers in c?
Q.1 write aprogram to stack using linklist o insert 40 items? Q.2 write a program to implement circular queue with help of linklist?
What are comments and how do you insert it in a C program?
Explain about C function prototype?
Explain what is page thrashing?
Write a program to swap two numbers without using third variable?
How is a macro different from a function?
Input is "rama loves rajesh and rajesh Loves rama also and rajesh wear gloves and bloves" To print output is count the numbers of times repeted the word love without case sensitive.
I just typed in this program, and it is acting strangely. Can you see anything wrong with it?
What functions are used for dynamic memory allocation in c language?
What are directives in c?
What does a derived class inherit from a base class a) Only the Public members of the base class b) Only the Protected members of the base class c) Both the Public and the Protected members of the base class d) .c file
Why structure is used in c?