uva 621

 1 #include<stdio.h>
 2 #include<string.h>
 3 int  main()
 4 {
 5     char  v[10000] ;
 6     int n ;
 7     scanf("%d",&n);
 8     while( n--)
 9     {  int i = 0 ;
10         memset(v , 'z',sizeof(v));
11         scanf("%s",v);
12         i = strlen(v);v[i]='z';i--;
13 
14         if( (v[0]=='1' || v[0]=='4') && v[2]== 'z')
15             {printf("+
");continue;}
16             if(v[0] == '7' && v[1] =='8' && v[2]=='z')
17             {printf("+
");continue;}
18 
19        if(v[i] == '4' && v[0]== '9'){printf("*
") ;continue;}
20        if(v[i]== '5' && v[i-1]== '3'){printf("-
"); continue;}
21        if(v[0]=='1' && v[1]== '9' && v[2]== '0'){printf("?
"); continue;}
22     }
23     return 0 ;
24 }

注意：别忘了字符串后面会加上''

例如输入78时 v[2] == ''