Programme For Palindrome
Hi,
I want how to write Palindrome programme programme without using any string functions and without any loops like while,do while.
Any one can tell simple way.
Thanks In advance,
MOULALI.
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Brajesh KumarPosted Feb 24, 2017, 12:13 PM
palindrome Program using recursion
int checkPalindrome(int);
int main(){
int num,sum;
printf("Enter a number: ");
scanf("%d",&num);
sum = checkPalindrome(num);
if(num==sum)
printf("%d is a palindrome",num);
else
printf("%d is not a palindrome",num);
return 0;
}
int checkPalindrome(int num){
static int sum=0,r;
if(num!=0){
r=num%10;
sum=sum*10+r;
checkPalindrome(num/10);
}
return sum;
#include
int is_palindrome(char*);
void copy_string(char*, char*);
void reverse_string(char*);
int string_length(char*);
int compare_string(char*, char*);
int main() {
char string[100];
int result;
printf("Enter a string\n");
gets(string);
result = is_palindrome(string);
if ( result == 1 )
printf("\"%s\" is a palindrome string.\n", string); else
printf("\"%s\" is not a palindrome string.\n", string);
return 0;
}
int is_palindrome(char *string) {
int check, length;
char *reverse;
length = string_length(string);
reverse = (char*)malloc(length+1);
copy_string(reverse, string);
reverse_string(reverse);
check = compare_string(string, reverse);
free(reverse);
if ( check == 0 )
return 1; else
return 0;
}
int string_length(char *string) {
int length = 0;
while(*string) {
length++;
string++;
}
return length;
}
void copy_string(char *target, char *source) {
while(*source) {
*target = *source;
source++;
target++;
}
*target = '\0';
}
void reverse_string(char *string) {
int length, c;
char *begin, *end, temp;
length = string_length(string);
begin = string;
end = string;
for ( c = 0 ; c < ( length - 1 ) ; c++ )
end++;
for ( c = 0 ; c < length/2 ; c++ ) {
temp = *end;
*end = *begin;
*begin = temp;
begin++;
end--;
}
}
int compare_string(char *first, char *second) {
while(*first==*second) {
if ( *first == '\0' || *second == '\0' )
break;
first++;
second++;
}
if( *first == '\0' && *second == '\0' )
return 0; else
return -1;
}