C Programming - C Preprocessor - Discussion
Discussion Forum : C Preprocessor - Find Output of Program (Q.No. 5)
5.
What will be the output of the program?
#include<stdio.h>
#define CUBE(x) (x*x*x)
int main()
{
int a, b=3;
a = CUBE(b++);
printf("%d, %d\n", a, b);
return 0;
}
Answer: Option
Explanation:
The macro function CUBE(x) (x*x*x) calculates the cubic value of given number(Eg: 103.)
Step 1: int a, b=3; The variable a and b are declared as an integer type and varaible b id initialized to 3.
Step 2: a = CUBE(b++); becomes
=> a = b++ * b++ * b++;
=> a = 3 * 3 * 3; Here we are using post-increement operator, so the 3 is not incremented in this statement.
=> a = 27; Here, 27 is store in the variable a. By the way, the value of variable b is incremented by 3. (ie: b=6)
Step 3: printf("%d, %d\n", a, b); It prints the value of variable a and b.
Hence the output of the program is 27, 6.
Discussion:
41 comments Page 4 of 5.
Mayank Sachan said:
1 decade ago
If b is incremented to 6 then in that case cube of it should also be incremented like 3*4*5.
Pankaj said:
1 decade ago
Your answer in totally wrong. You can check by compiling. It is 60, 6.
Chandra shekar said:
7 years ago
The answer is 60, 6.
Because (b++*b++*b++),
3*4*5,
60 and b=6;
Because (b++*b++*b++),
3*4*5,
60 and b=6;
Ahmed said:
3 years ago
I think the right answer will be 60, 6
Because 3*4*5 = 60.
Because 3*4*5 = 60.
(9)
Srinivas said:
1 decade ago
Here how 'b' value became six can you explain in detail?
Kuldeep Saroj said:
7 years ago
Value of A and B must be as below:
a= 3*4*5=60;
b=6;
a= 3*4*5=60;
b=6;
Nidhi said:
9 years ago
I did not understand this output. Can anyone help me?
Prashant said:
1 decade ago
Actual answer is (b++*b++*b++)
3*4*5
60 and b=6;
3*4*5
60 and b=6;
Nti said:
8 years ago
Yes, 60 6 is right. I agree with it.
Ratan Lal said:
9 years ago
I got the answer on GCC is 60, 6.
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