暑假集训(1)第六弹 -----简单计算器（Hdoj1237)

 1 #include "cstdio"
 2 void mset(double a[])
 3 {
 4    for (int i=0;i<405;i++)
 5       a[i] = 0;
 6 }
 7 int main()
 8 {
 9    double a[405];
10    double sum;
11    int flag,i;
12    int m;
13    char c;
14    while (1)
15    {
16       mset(a);
17       i=0;
18       flag=0;
19       scanf ("%lf",&a[0]);
20       while (getchar() != ‘\n‘)
21       {
22           sum=0;
23           flag =1;
24           scanf ("%c %d",&c,&m);
25           switch (c)
26           {
27             case ‘+‘ : a[++i] = m;  break;
28             case ‘-‘ : a[++i] = -m; break;
29             case ‘*‘ : a[i] = a[i]*m; break;
30             case ‘/‘ : a[i] = a[i]/m * 1.0; break;
31           }
32       }
33       if (!flag)
34              break;
35       for (int j=0;j<=i+1;j++)
36            sum+=a[j];
37       printf ("%.2lf\n",sum);
38    }
39     return 0;
40 }