#include <stdio.h>
main()
{     int base,i;
      char num[20];
      float s=0;
      do
      {
            printf("输入数的进制(<=16):")；
            scanf("%d",&base);
      }while(base<1&&base>=16);
      printf("输入该进制的一个整数:")；
      scanf("%s",num);
      i=0;
      while(num[i]!='\0')
      {
      switch(num[i])
           {
           case 'a':
           case 'A': s=s*base+10;break;
           case 'b':
           case 'B': s=s*base+11;break;
           case 'c':
           case 'C': s=s*base+12;break;
           case 'd':
           case 'D': s=s*base+13;break;
           case 'e':
           case 'E': s=s*base+14;break;
           case 'f':
           case 'F': s=s*base+15;break;
           case '9': case '8': case '7': case '6': case '5':
           case '4': case '3': case '2': case '1': case '0':
                s=s*base+num[i]-'0';break;
           }
           i++;
      }
      printf("%d进制整数%s的十进制结果为%g\n"，base,num,s);
}

[[it] 本帖最后由 kogm123 于 2008-5-20 12:49 编辑 [/it]]

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