1 #include<stdio.h>
2 #include<stdlib.h>
3 #include<string.h>
4 #include<ctype.h>
5
6 int main()
7 {
8 int i,j,ncases,J=0,C=0;
9 int k,len,ok;
10 char s[201];
11
12 scanf("%s",s);
13 len = strlen(s);
14 for(i=0; i<len; i++)
15 {
16 if(isupper(s[i]))
17 {
18 J = 1;
19 if(i == 0)
20 {
21 C=1;
22 break;
23 }
24 }
25 if(s[i]=='_')
26 {
27 C = 1;
28 if(i==0||s[i+1]=='\0'||s[i+1]=='_')
29 {
30 J = 1;
31 break;
32 }
33 }
34 }
35 if(J == 1&&C == 1)
36 printf("Error!\n");
37 if(J==0 && C==0)
38 printf("%s\n",s);
39 if(J==1&&C==0)
40 {
41 k = 0;
42 for(j=0; s[j]!='\0'; j++)
43 {
44 if(isupper(s[j]))
45 {
46
47 printf("_%c",tolower(s[j]));
48 }
49 else
50 {
51 printf("%c",s[j]);
52 }
53 }
54 printf("\n");
55 }
56 if(C==1&&J==0)
57 {
58 k = 0;
59 for(j=0,ok=0; s[j]!='\0'; j++)
60 {
61 if(s[j] == '_')
62 {
63 ok = 1;
64 continue;
65 }
66 if(islower(s[j])&&ok==1)
67 {
68 printf("%c",toupper(s[j]));
69 ok = 0;
70 }
71 else
72 {
73 printf("%c",s[j]);
74 }
75 }
76 printf("\n");
77 }
78 //system("pause");
79 return 0;
80 }
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