9.2 NOIP提高组试题精解(1)

9-16 poise.c

 #include <stdio.h>
 #define MAXN 1001
 int main()
 {
    ], flag[MAXN] = {  }; //保存6种砝码的数量
    ] = { , , , , ,  };    //不同重量的砝码
    int i, j, k, total;
    FILE *fp1, *fp2;
    if ((fp1 = fopen("poise.in", "r")) == NULL)
    {
       printf("不能打开文件!\n");
       exit();
    }
    ; i < ; i++)    //读入各种砝码的数量
       fscanf(fp1, "%d", &num[i]);
    fclose(fp1);
    total = ;
    flag[] = ;
    ; i < ; i++) //循环检查6种砝码
    {
       ; j < num[i]; j++) //分别用不同数量砝码
       {
          ; k >= poise[i]; k--)
              && flag[k] == )
             {
                flag[k] = ;
                total++;
             }
       }
    }
    if ((fp2 = fopen("poise.out", "w")) == NULL)
    {
       printf("不能打开文件!\n");
       exit();
    }
    printf("Total=%d\n", total);
    fprintf(fp2, "Total=%d\n", total);
    fclose(fp2);
    getch();
    ;
 }

9-17 save.c

 #include <stdio.h>
 #define MONTH 12
 int main()
 {
    int money[MONTH], save, balance, i;
    FILE *fp1, *fp2;
    if ((fp1 = fopen("save.in", "r")) == NULL)
    {
       printf("不能打开文件!\n");
       exit();
    }
    if ((fp2 = fopen("save.out", "w")) == NULL)
    {
       printf("不能打开文件!\n");
       exit();
    }
    ; i < MONTH; i++)    //读入12个月的预算
       fscanf(fp1, "%d", &money[i]);
    fclose(fp1);
    save = ;
    balance = ;
    ; i < MONTH; i++)
    {
       balance = balance +  - money[i];    //每月剩余金额
       )    //超过100
       {
          save += ;    //储蓄100
          balance -= ;    //剩余部分
       }
       )    //若剩余部分小于0
       {
          printf());    //输出本月不够
          fprintf(fp2, ));
          break;
       }
    }
    )    //余额大于0
    {
       printf("%.2f\n", balance + (save * 1.2));    //输出最后总的金额
       fprintf(fp2, "%.2f\n", balance + (save * 1.2));
    }
    getch();
    ;
 }