Strrev function

Question

Can't we use strrev() in here??
#include <stdio.h>
#include <string.h>

int main()
{
char h[20];
scanf("%s",h);
int len=strlen(h);
char k[20];
k=strrev(h);
printf("%s",k);
return 0;
}

It says that fuction strrev is not defined.

Answer 1

According to this thread, strrev may not be available in certain compilers.

https://www.sololearn.com/Discuss/1350351/?ref=app

Answer 2

May be because of sololearn
I too used it many times it occur same
You could use loop to reverse the string
Or try this in another app
Like turbocdriod

Answer 3

strrev used to work in sololearn because they used microsoft servers, but these days they switched to linux servers. and the strrev function does not work on linux due to different platform and compiler.

you can build the function yourself if you want to use the strrev function