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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. //#include <conio.h> 
  4.  
  5. // プロトタイプ
  6. void EnCode( char *, int );
  7. void DeCode( char *, int );
  8.  
  9.  
  10. //****************************************************************************//
  11. //　◎メイン関数　
  12. //****************************************************************************//
  13. int main()
  14. {
  15. 	char *str = NULL;
  16. 	int shift;
  17.  
  18. 	// 
  19. 	printf( "文字列を入力してください:\n" );
  20. 	for ( int size = 1;  ; size++ ){
  21. 		str = (char*)realloc(str, sizeof(char)*size);					// 動的サイズ変更
  22. 		if ( str == NULL ) exit(1);							// メモリ確保失敗
  23. 		str[size-1] = getchar();							// 入力データ取得
  24. 		if ( str[size-1] == '\n' ) break;						// 終了文字発見
  25. 	}
  26. 	printf( "シフト値を入力してください(1～25):\n" );
  27. 	scanf( "%d", &shift );
  28.  
  29. 	// 
  30. 	EnCode( str, shift );
  31. 	printf( "暗号文 → " );
  32. 	for ( int loop = 0; str[loop] != '\n'; loop++ ) putchar(str[loop]);
  33. 	printf("\n");															
  34. 	DeCode( str, shift );
  35. 	printf( "複合文 → " );
  36. 	for ( int loop = 0; str[loop] != '\n'; loop++ ) putchar(str[loop]);
  37.  
  38. 	free(str);															
  39. 	//getch();															
  40. 	return 0;
  41. }
  42.  
  43.  
  44. //-----------------------------------------------------------------------------//
  45. // 関数名　：　EnCode()
  46. // 機能概要：　暗号化処理
  47. //-----------------------------------------------------------------------------//
  48. void EnCode( char *str, int num )
  49. {
  50. 	for ( ; *str != '\n'; str++ ){ 
  51. 		if	( 'A' <= *str && *str <= 'Z' ) *str = (*str-'A' + num) % 26 + 'A';	// 26 = ('Z'-'A'+1)
  52. 		else if ( 'a' <= *str && *str <= 'z' ) *str = (*str-'a' + num) % 26 + 'a';	// 26 = ('z'-'a'+1)
  53. 		else if ( ' ' <= *str && *str <= '9' ) *str = (*str-' ' + num) % 26 + ' ';	// 26 = ('9'-' '+1)
  54. 	}
  55. }
  56.  
  57.  
  58. //-----------------------------------------------------------------------------//
  59. // 関数名　：　DeCode()
  60. // 機能概要：　複合化処理
  61. //-----------------------------------------------------------------------------//
  62. void DeCode( char *str, int num )
  63. {
  64. 	for ( ; *str != '\n'; str++ ){
  65. 		if	( 'A' <= *str && *str <= 'Z' ) *str = (*str-'A' + 26-num) % 26 + 'A';
  66. 		else if ( 'a' <= *str && *str <= 'z' ) *str = (*str-'a' + 26-num) % 26 + 'a';
  67. 		else if ( ' ' <= *str && *str <= '9' ) *str = (*str-' ' + 26-num) % 26 + ' ';
  68. 	}
  69. }
  70.  
Success #stdin #stdout 0s 2864KB
comments (?)
stdin
copy 
fgeywgfyeawgyfgfhg YGUGEUIWGHUE GHUI 8763426346329 jduifhw
3
stdout
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文字列を入力してください:
シフト値を入力してください(1～25):
暗号文 → ijhbzjibhdzjbijikj#BJXJHXLZJKXH#JKXL#! 9675967965"#mgxlikz
複合文 → fgeywgfyeawgyfgfhg YGUGEUIWGHUE GHUI 8763426346329 jduifhw
https://ideone.com/opunBs
language:
C++ 4.3.2 (gcc-4.3.2)
created:
11 years ago
visibility:
secret

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