UVA537 - Artificial Intelligence?

题目http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=96&page=show_problem&problem=478

依次搜查就行了 要注意m,k,M这几个不是标准单位 要进行换算一下，写着有点麻烦，多注意一些。

View Code

  1 #include <stdio.h>

  2 #include <stdlib.h>

  3 #include<string.h>

  4 char c[1001];

  5 float swit(char f,int j)

  6 {

  7     float s = 0,x;

  8     int y,i;

  9     i = j;

 10     while(c[j]>='0'&&c[j]<='9'&&j<strlen(c))

 11     {

 12         j++;

 13     }

 14     x = 1;

 15     y = j;

 16     y--;

 17     while(y>=i)

 18     {

 19         s += (c[y]-48)*x;

 20         x *= 10;

 21         y--;

 22     }

 23     x = 1.0/10;

 24     if(c[j] == '.')

 25     {

 26         j++;

 27         while(c[j]>='0'&&c[j]<='9'&&j<strlen(c))

 28         {

 29             s += (c[j]-48)*x;

 30             x = x/10;

 31             j++;

 32         }

 33     }

 34     if(j!=strlen(c))

 35     {

 36         if(c[j] == 'm')

 37             s = s/1000;

 38         if(c[j] == 'k' )

 39         s = s*1000;

 40         if(c[j] == 'M')

 41         s = s*1000000;

 42     }

 43     return s;

 44 }

 45 int main()

 46 {

 47     int t, i, j, k,count,flag,a[300],g = 0;

 48     float s,x,I,v,P;

 49     scanf("%d%*c", &t);

 50     while(t--)

 51     {

 52         g++;

 53         a['U'] = 1;

 54         a['I'] = 1;

 55         a['P'] = 1;

 56         flag = 0;

 57         count = 0;

 58         gets(c);

 59         k = strlen(c);

 60         for(i = 0  ; i < k ; i++)

 61         {

 62             if(i<k-2&&(c[i] == 'U'||c[i] == 'P'||c[i] == 'I')&&c[i+1] == '=')

 63             {

 64                 j = i+2;

 65                 s = swit(c[i],j);

 66 

 67                 if(c[i] == 'U')

 68                 {

 69                     v  = s;

 70                     count++;

 71                     a[c[i]] = 0;

 72                 }

 73                 if(c[i] == 'I')

 74                 {

 75                     I = s;

 76                     count++;

 77                     a[c[i]] = 0;

 78                 }

 79                 if(c[i] == 'P')

 80                 {

 81                     P = s;

 82                     count++;

 83                     flag = 1;

 84                     a[c[i]] = 0;

 85                 }

 86                 if(count == 2)

 87                 {

 88                     break;

 89                 }

 90                 i+=2;

 91             }

 92         }

 93         printf("Problem #%d\n",g);

 94         if(flag == 0)

 95         {

 96             printf("P=%.2fW\n",I*v);

 97         }

 98         else

 99         {

100             if(a['U'] == 0)

101             printf("I=%.2fA\n",P/v);

102             else

103             printf("U=%.2fV\n",P/I);

104         }

105         puts("");

106     }

107     return 0;

108 }