fork download
copy 
  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. /**
  6. Convert decimal number lying between 1-3999 to roman numerals
  7.  
  8. SYMBOL       VALUE
  9. I             1
  10. II			  2
  11. III			  3
  12. IV            4
  13. V             5
  14. X             10
  15. L             50
  16. C             100
  17. D             500
  18. M             1000     
  19. **/
  20.  
  21. //3999 - MMMCMXCIX
  22. string roman(int n){
  23. 	string s = "";
  24. 	int tho = n / 1000;
  25. 	while(tho--) {
  26. 		s= s+"M";
  27. 	}
  28. 	n = n % 1000;
  29. 	int hun = n / 100;
  30. 	if(hun == 9) {
  31. 		s+= "CM";
  32. 	} else if (hun >= 5) {
  33. 		s+= "D";
  34. 		while(hun-- > 5) {
  35. 			s+= "C";
  36. 		}
  37. 	} else {
  38. 		if(hun == 4) {
  39. 			s+= "CD";
  40. 		} else {
  41. 			while(hun--) {
  42. 				s += "C";
  43. 			}
  44. 		}
  45. 	}
  46.  
  47. 	n = n % 100;
  48. 	int ten = n / 10;
  49. 	if(ten == 9) {
  50. 		s+= "XC";
  51. 	} else if (ten >= 5) {
  52. 		s+="L";
  53. 		while(ten-- > 5) {
  54. 			s+="X";
  55. 		}
  56. 	} else {
  57. 		if(ten == 4) {
  58. 			s+= "XL";
  59. 		} else {
  60. 			while(ten --) {
  61. 				s+= "X";
  62. 			}
  63. 		}
  64. 	}
  65.  
  66. 	n = n % 10;
  67. 	if(n == 9) {
  68. 		s+= "IX";
  69. 	} else if (n >= 5) {
  70. 		s+= "V";
  71. 		while(n-- > 5) {
  72. 			s+= "I";
  73. 		}
  74. 	} else {
  75. 		if(ten == 4) {
  76. 			s+= "IV";
  77. 		} else {
  78. 			while(n--) {
  79. 				s+= "I";
  80. 			}
  81. 		}
  82. 	}
  83. 	return s;
  84.  
  85.  
  86. }
  87.  
  88. int main() {
  89. 	int intNum = 0;
  90. 	cin >> intNum;
  91. 	cout << roman(intNum);
  92. 	return 0;
  93. }
Success #stdin #stdout 0s 5296KB
comments (?)
stdin
copy 
3946
stdout
copy 
MMMCMXLVI
https://ideone.com/65H6Uw
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!