C Programming - C Preprocessor - Discussion
Discussion Forum : C Preprocessor - Find Output of Program (Q.No. 4)
4.
What will be the output of the program?
#include<stdio.h>
#define JOIN(s1, s2) printf("%s=%s %s=%s \n", #s1, s1, #s2, s2);
int main()
{
char *str1="India";
char *str2="BIX";
JOIN(str1, str2);
return 0;
}
Discussion:
35 comments Page 1 of 4.
Poovarasan said:
4 years ago
Not getting it. Please explain me.
Ashwini said:
6 years ago
#define JOIN(s1, s2) printf("%s=%s %s=%s \n", #s1, s1, #s2, s2);
How ?
please help me to understand it?
How ?
please help me to understand it?
Saravana said:
6 years ago
# is called Stringizing operator, whatever you pass (here variable name ) is converted to String, so result come with the variable name.
(1)
Jayesh said:
6 years ago
This because there we use the JOIN STRING FUNCTION in which the str1 print& then next str2join the str1.
Because we have to use join string function.
Because we have to use join string function.
(1)
Sruthi said:
6 years ago
The rule is if the parameter name is preceded by a # in the macro expansion, the combination (of # and parameter) will be expanded into a quoted string with the parameter replaced by the actual argument. This can be combined with string concatenation to print desired the output.
Kaviyakarthi said:
7 years ago
@Sunil:
I thought the solution is,
a = ++b*++b*++b.
a = ++3*++b*++b.
a = 4*++4*++b.
a = 4*5*++5.
a = 4*5*6.
a = 120.
b = 6.
I thought the solution is,
a = ++b*++b*++b.
a = ++3*++b*++b.
a = 4*++4*++b.
a = 4*5*++5.
a = 4*5*6.
a = 120.
b = 6.
Kaviyakarthi said:
7 years ago
@Sunil:
I thought the solution is,
a = ++b*++b*++b.
a = ++3*++b*++b.
a = 4*++4*++b.
a = 4*5*++5.
a = 4*5*6.
a = 120.
b = 6.
I thought the solution is,
a = ++b*++b*++b.
a = ++3*++b*++b.
a = 4*++4*++b.
a = 4*5*++5.
a = 4*5*6.
a = 120.
b = 6.
Nimisha said:
8 years ago
#s is used to print string value.
Bhushan said:
8 years ago
@Sunil : It should be:
216.
6.
Value would be overwrite.
a = (++b * ++b * ++b).
a = (4 * ++b * ++b).
a = (5 * 5 * ++b).
a = (6 * 6 * 6).
a = 216.
216.
6.
Value would be overwrite.
a = (++b * ++b * ++b).
a = (4 * ++b * ++b).
a = (5 * 5 * ++b).
a = (6 * 6 * 6).
a = 216.
Omkar said:
8 years ago
Can anyone explain @Sunil's program ?
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