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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. int main() {
  5.  
  6. 	char text[1000];
  7. 	int key,i;
  8. 	char offset;
  9. 	printf("Enter The text\n");
  10. 	scanf("%s",text);
  11. 	printf("Enter the key (positive to encrypt negative to decypt zero to exit)\n");
  12. 	scanf("%i",&key);
  13.  
  14. 	if(!key)
  15. 		return 0;
  16. 	for(i=0;text[i];i++)
  17. 	{
  18. 		offset='a';
  19. 		if(isupper(text[i]))
  20. 			offset='A';
  21. 		text[i]-=offset;
  22. 		text[i]=(26+text[i]+key)%26;
  23. 		text[i]+=offset;
  24. 	}
  25. 	printf("%s\n",text);
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 2296KB
comments (?)
stdin
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EvefXieq
-4
stdout
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Enter The text
Enter the key (positive to encrypt negative to decypt zero to exit)
ArabTeam
https://ideone.com/UXlF7x
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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