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  1. #include <stdio.h>
  2.  
  3. void bunsa(int *, int *, int *, int * , int * , int *   );
  4. void bunsyo(int *, int *, int *, int * , int * , int *   );
  5. void yakubun(int *, int *);
  6.  
  7. int main()
  8. {
  9.     int x1, x2, y1, y2, a1, a2, b1, b2;
  10.  
  11.     printf("分数1の分子を入力してください：");
  12.     scanf("%d", &x1);
  13.     printf("分数1の分母を入力してください：");
  14.     scanf("%d", &x2);
  15.     printf("分数2の分子を入力してください：");
  16.     scanf("%d", &y1);
  17.     printf("分数2の分母を入力してください：");
  18.     scanf("%d", &y2);
  19.  
  20.     bunsa(&x1, &x2, &y1, &y2, &a1, &a2);
  21.     yakubun(&a1, &a2);
  22.  
  23.     bunsyo(&x1, &x2, &y1, &y2, &b1, &b2);
  24.     yakubun(&b1, &b2);
  25.  
  26.     printf(" %d / %d － %d / %d = %d / %d \n", x1, x2, y1, y2, a1, a2);
  27.     printf(" %d / %d ÷ %d / %d = %d / %d \n", x1, x2, y1, y2, b1, b2);
  28.     return 0;
  29. }
  30.  
  31. void bunsa( int *x1, int *x2, int *y1, int *y2, int *a1, int *a2)
  32. {
  33.     *a1 = *x1 * *y2 - *x2 * *y1;
  34.     *a2 = *x2 * *y2;
  35. }
  36.  
  37. void bunsyo(  int *x1, int *x2, int *y1, int *y2, int *b1, int *b2)
  38. {
  39.     *b1 = *x1 **y2;
  40.     *b2 = *x2 **y1;
  41. }
  42.  
  43. void yakubun(  int *n1, int *n2)
  44. {
  45.     int w1 = *n1;
  46.     int w2 = *n2;
  47.     int t;
  48.  
  49.     if (w1 < 0)w1 *= -1;
  50.     if (w2 < 0)w2 *= -1;
  51.     while (w1 * w2)
  52.     {
  53.         w1 %= w2;
  54.         t = w1; w1 = w2; w2 = t;
  55.     }
  56.     *n1 /= w1;
  57.     *n2 /= w1;
  58. }
  59.  
Success #stdin #stdout 0.02s 1680KB
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stdout
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分数1の分子を入力してください：分数1の分母を入力してください：分数2の分子を入力してください：分数2の分母を入力してください： 1 / 2 － 3 / 4 = -1 / 4 
 1 / 2 ÷ 3 / 4 = 2 / 3
https://ideone.com/6lQA5H
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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