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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. void decode(char *msg, int shift) {
  5. 	char *c;
  6. 	// jedz po tablicy poki nie spotkasz nulla
  7. 	for (c = msg; *c != '\0'; c++) {
  8. 		int max, min;
  9. 		int ascii = (int)*c;
  10. 		// sprawdz czy maly czy duzy znak
  11. 		if (ascii >= 97 && ascii <= 122) {
  12. 			// male znaki
  13. 			max = 123;
  14. 			min = 97;
  15. 		} else if (ascii >= 65 && ascii <= 90) {
  16. 	    	// duze znaki
  17. 			max = 91;
  18. 			min = 65;
  19. 		} else {
  20. 			continue;
  21. 		}
  22. 		// zrob cezara
  23. 		ascii += shift;
  24. 		// jesli wypadamy poza range - modulo + min
  25. 		if (ascii >= max) {
  26. 			ascii = (ascii + min) % max;
  27. 		}
  28. 		// podmien
  29. 		*c = ascii;
  30. 	}
  31. }
  32.  
  33. int main(void) {
  34. 	char msg[20] = "Adam Jest ze";
  35. 	int shift = 1;
  36. 	printf("orig :       %s \n", msg);
  37. 	decode(msg, shift);
  38. 	printf("caesar by %d: %s",shift, msg);
  39. 	return 0;
  40. }
  41.  
Success #stdin #stdout 0s 4528KB
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Standard input is empty
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orig :       Adam Jest ze 
caesar by 1: Bebn Kftu af
https://ideone.com/mwOHjk
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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