Interested to Buy Any Domain ? << Click Here >> for more details...
#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);}
- 3 Answers
- 16362 Views
- I also Faced
- E-Mail Answers
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
What is a buffer in c?
How can I handle floating-point exceptions gracefully?
Write a program to print “hello world” without using semicolon?
Do pointers need to be initialized?
Why is it usually a bad idea to use gets()? Suggest a workaround.
Which type of language is c?
what are bit fields in c?
How can I avoid the abort, retry, fail messages?
Some coders debug their programs by placing comment symbols on some codes instead of deleting it. How does this aid in debugging?
What is a nested loop?
What is the use of linkage in c language?
Place the #include statement must be written in the program?
What are shell structures used for?
Why do we use pointer to pointer in c?
what is the differnce between programing langauge and tool? is sas is a programing langauge r tool?
