If i directly compare two strings on printf it produce only null value..why.?

Answer 1

#include<stdio.h>
void main()
{
char a[]="mani";
char b[]="mani";
printf("%s",a==b);
}
if i compiled this .this produce the output like [null]

Answer 2

I guess it's better to use designated function for string comparison rather than == operator, and Ketan Lalcheta was right, when he said a==b is not evaluated as string, but a boolean instead.

#include <stdio.h>
#include <string.h>

int main()
{
char a[]="mani";
char b[]="mani";

if(strcmp(a, b))
printf("%s differs with %s", a, b);
else
printf("%s equals to %s", a, b);

return 0;
}

Answer 3

M.MANIVANNAN
a==b is no longer a char[].. it is Boolean operation...

to print your value, put %s , a and put %s,b in two different printf

Answer 4

if I'm not mistaken, a==b and strcmp(a,b) are completely different things. In the first case, you are comparing pointers to memory positions and the value will be false if both positions are not the same, even if the contents are. For example, a points to a position 1000 that contains 'cat', b points to position 2000 that also contains 'cat'. a==b will be false and strcmp(a,b) will be true.
So Ipang's advice is solid.

a==b would be true only if you first did
a=b;. i.e., made a point to the same memory position of b.

Answer 5

Please attach your code link, it's difficult to imagine what you really mean.