I am trying to reverse a string without affecting the position of special characters in it. But, my program is not running properly and it gives a runtime error when executed on Ideone - link.
From what I can think is that there is some problem with the char* variable that I am using there. Please correct me and provide an explanation why this is happening.
THANKS IN ADVANCE
Here’s the code if you wish to see here
#include<bits/stdc++.h>
using namespace std;
char *func(char*);
int main(){
char* in = "ab$cd";
char* out = "";
out = func(in);
printf("%s" , out);
return 0;
}
char* func(char* in){
//char *out = "";
int len = strlen(in);
int i = 0;
int j = len - 1;
while(i<j)
{
if(!isalpha(in[i]))
i++;
else if(!isalpha(in[j]))
j--;
else {
swap(in[i] , in[j]);
i++;
j--;
}
}
//out = in;
return in;
}
I got this list of errors on running this at hackerrank compiler-
Runtime error
Compile Time
Compile Message
solution.cc: In function ‘int main()’:
solution.cc:8:12: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
char* in = "ab$cd";
^~~~~~~
solution.cc:10:13: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
I think you should google this thing up. Sites like Stackoverflow should have something related to it.
I think this link explains the issue satisfactorily.
Assigning a string to “char *in” prevents you from modifying it in the future. Use “char in[]” instead.
@vijju123 Thanks for answering. Actually I did google it but couldn’t find anything worth and I find codechef community better than SO community that’s why I always come here first.
