Reverse a String without using C functions
char * rev_string (char * str)
{
char temp;
int i , j;
for (i = 0 ; str[i]!= '\0' ; i++);
for(j = 0 ; j < i ; j++ , i--)
{
temp = str[j];
str[j] = str[i];
str[i] = temp;
}
return str;
}
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