IS PALINDROME CHECKING WITHOUT USING <string.h> HEADER FILE???
int main()
{
char s1[50],s2[50],s3[50];
int i,j,k,len = 0,flag=0;
printf("Enter your String: ");
scanf("%s",s1);
printf("\n<------ Here, we have copied s1 string to s2 string ----->");
i=0;
while(s1[i] != '\0')
{
s2[i] = s1[i];
i++;
}
s2[i] = '\0';
printf("\n Your enterd string is copied to s2 and string is: %s\n",s2);
printf("\n<------ Here, we have reversed s2 string into s3 string----->");
i = 0;
while(s2[i]!='\0')
{
len++;
i++;
}
k = len-1;
for(j = 0; j < len; j++)
{
s3[j] = s2[k];
k--;
}
s3[j] = '\0';
printf("\n The reverse string of s2 is stored in s3 and that is : %s\n",s3);
printf("\n<---- We have compared s1 string and s2 string to check if it is PALINDROME ---->");
for(i=0,j=0;s1[i]!='\0',s3[j] != '\0';i++,j++)
{
if (s1[i] != s3[j])
{
flag = 1;
break;
}
}
if (flag == 1)
{
printf("\n String you entered is Not PALINDROME string\n");
}
else
{
{
printf("\n String you entered is PALINDROME string\n");
}
printf("\n <----- Your program is ended here----->");
return 0;
}
INPUT && OUTPUT
