Write a program to check given string is palindrome number or not using c language.

  #include<string.h>  
  #include<conio.h>  
  #include<stdio.h>  
  int main()  
 {  
   char *str1,*rev;  
    int i,j;  
   printf("\nEnter a string:");  
    scanf("%s",str1);  
    for(i=strlen(str1)-1,j=0;i>=0;i--,j++)  
    rev[j]=str[i1];  
    rev[j]='\0';  
  if(strcmp(rev,str1))  
    printf("\nThe string is not a palindrome");  
  else  
    printf("\nThe string is a palindrome");  
  return 0;  
 }