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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4.  
  5. int top=-1;
  6.  
  7. char stack_string[100];
  8. void push(char word);
  9. char pop(void);
  10.  
  11. int main(void){
  12. 	char input;
  13. 	char str[100];
  14. 	int i, len;
  15. 	printf("press [a] for palindrome check, [b] for string reversal:");
  16. 	scanf("%c", &input);
  17. 	printf("Input a string: ");
  18. 	scanf(" %99[^\n]", str);
  19. 	len = strlen(str);
  20.  
  21. 	if (input == 'b'){
  22. 		for(i = 0; i < len; i++)
  23. 			push(str[i]);
  24. 		for(i = 0; i < len; i++)
  25. 			str[i]=pop();
  26. 		printf("Reversed String is: %s\n", str);
  27. 	}
  28. 	else if(input == 'a'){
  29. 		int count = 0;
  30.  
  31. 		for (i = 0; i < len; i++){
  32. 			if(!isspace((unsigned char)str[i]))
  33. 				push(str[i]);
  34. 		}
  35.  
  36. 		for (i = 0; i < len; i++){
  37. 			if (isspace((unsigned char)str[i]) || tolower(str[i])==tolower(pop()))
  38. 				count++;
  39. 		}
  40.  
  41. 		if (count == len)
  42. 			printf("%s is a palindrome\n", str);
  43. 		else
  44. 			printf("%s is not a palindrome\n", str);
  45. 	}
  46. 	return 0;
  47. }
  48.  
  49. void push(char word){
  50. 	top=top+1;
  51. 	stack_string[top]=word;
  52. }
  53.  
  54. char pop(){
  55. 	char word = stack_string[top];
  56. 	top=top-1;
  57. 	return word;
  58. }
Success #stdin #stdout 0s 9432KB
comments (?)
stdin 
a
MIU im
stdout 
press [a] for palindrome check, [b] for string reversal:Input a string: MIU im is a palindrome
https://ideone.com/BG8pfw
language:
C99 (gcc 8.3)
created:
8 years ago
visibility:
public

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