罗马数字转阿拉伯数字

1. 罗马数字不是位置计数，他的缺点是表数范围小、计算难度大、表数的方式比较混乱、人从一连串字母数字中不易分析出具体的数值、表数要求太复杂。
2. 我的学号：阿拉伯数字（20221320）罗马数字(XXCCXXMCCCXX)(上划线见下方截图）
3. 
4. 1. #include <stdio.h>
   2. #include <string.h>
   4. int judge(char* roma);
   5. int Match(char* temp);
   6. int main(int argc, const char * argv[]) {
   7. char roma[50];
   8. scanf("%s",roma);
   9. printf("%d",judge(roma));
   10. return 0;
   11. }
   13. int judge(char* roma)
   14. {
   15. int num=0,i,j,k=0,l=0;
   16. char temp[4]={0};
   17. int res[4]={0};
   18. for(i=0;i<strlen(roma);i=i+k)
   19. {
   20. for(j=3;j>=0;j--)
   21. {
   23. if(roma[i+j])
   24. {
   25. memset(temp, '\0', sizeof(temp));
   26. for(k=0;k<=j;k++)
   27. {
   28. temp[k]=roma[i+k];
   29. }
   30. //Match(temp);
   31. if(Match(temp)!=0)
   32. {
   33. res[l++]=Match(temp);
   34. break;
   35. }
   36. }
   37. }
   38. }
   39. for(l=0;l<4;l++)
   40. {
   41. num+=res[l];
   42. }
   43. return num;
   44. }
   46. int Match(char* temp)
   47. {
   48. char* r[50]={"M","MM","MMM",
   49. "C","CC","CCC","CD","D","DC","DCC","DCCC","CM",
   50. "X","XX","XXX","XL","L","LX","LXX","LXXX","XC",
   51. "I","II","III","IV","V","VI","VII","VIII","IX"};
   52. for(int i=0;i<30;i++)
   53. {
   54. //printf("%d",strlen(r[0]));
   55. //printf("%d",sizeof(r)/sizeof(r[0]));
   56. if(strcmp(r[i], temp)==0)
   57. {
   58. switch (i) {
   59. case 0:return 1000;
   60. case 1:return 2000;
   61. case 2:return 3000;
   62. case 3:return 100;
   63. case 4:return 200;
   64. case 5:return 300;
   65. case 6:return 400;
   66. case 7:return 500;
   67. case 8:return 600;
   68. case 9:return 700;
   69. case 10:return 800;
   70. case 11:return 900;
   71. case 12:return 10;
   72. case 13:return 20;
   73. case 14:return 30;
   74. case 15:return 40;
   75. case 16:return 50;
   76. case 17:return 60;
   77. case 18:return 70;
   78. case 19:return 80;
   79. case 20:return 90;
   80. case 21:return 1;
   81. case 22:return 2;
   82. case 23:return 3;
   83. case 24:return 4;
   84. case 25:return 5;
   85. case 26:return 6;
   86. case 27:return 7;
   87. case 28:return 8;
   88. case 29:return 9;
   89. break;
   91. default:
   92. break;
   93. }
   94. }
   95. }
   96. return 0;
   97. }
   98. 

        

        

        

        (程序运行时不能输上划线，故只有分开输）