C 习题2-5 分数化小数

 1     int a, b, c;
 2     scanf("%d %d %d",&a,&b,&c);
 3 
 4     int integer = a/b;
 5     int remainderTemp=a%b;
 6     int arr[100];
 7 
 8     for(int i = 0; i< c; i++)
 9     {
10         int resultTemp = remainderTemp * 10;
11         arr[i] = resultTemp/b;
12         remainderTemp = resultTemp%b;
13     }
14     printf("%d.",integer);
15 
16     for(int i = 0; i < c;i++)
17     {
18         printf("%d",arr[i]);
19     }
20 
21     getchar();
22     getchar();
23     return 0;

scanf("%d%d%d", &a, &b, &c);
printf("%.*f\n", c, (double)a/b);