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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. int mystrlen(char s[]){
  4. 	int i;
  5. 	for(i=0;s[i]!='\0';i++);
  6. 	return i;
  7. }
  8. char *parindrome(char s[]){
  9. 	int i,size;
  10. 	char *tmp;
  11. 	tmp=(char *)malloc(sizeof(char)*(2*size+1));
  12. 	if(tmp==NULL){
  13. 		printf("ERROR\n");
  14. 		return NULL;
  15. 	}
  16. 	size=mystrlen(s);
  17. 	for(i=0;i<size;i++){
  18. 		tmp[i]=s[i];
  19. 	}
  20. 	for(i=0;i<size;i++){
  21. 		tmp[i+size]=s[size-1-i];
  22. 	}
  23. 	return tmp;
  24. }
  25. int main(){
  26. 	char nyuryoku[1024];
  27. 	char *kaibun;
  28. 	scanf("%s",nyuryoku);
  29. 	kaibun=parindrome(nyuryoku);
  30. 	printf("%s->%s",nyuryoku,kaibun);
  31. 	free(kaibun);
  32.  
  33. }
Success #stdin #stdout 0s 5324KB
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stdin
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abcd
stdout
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abcd->abcddcba
https://ideone.com/cMTab6
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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