分數的四則運算

標籤：函數   c語言   運算   負數   除法   分享圖片   不能   老師   src   

#include<stdio.h>  #include<Windows.h>  #include<time.h>  void main()  {      int a, b, c, d,i,e,n;      float p, q;      srand(unsigned( time(NULL)));      for (i = 0; i < 30; i++)      {          a = rand() % 100;          b = rand() % 100;          c = rand() % 5;         switch (c)         {         case 0: printf("%d + %d =\n", a, b);             break;         case 1:if (a < b)         {                    d = a;                    a = b;                    b = d;         }                printf("%d - %d =\n", a, b);                break;         case 2:printf("%d * %d =\n", a, b);             break;         case 3:             while (b == 0)             {                 b = rand() % 100;             }             printf("%d / %d =\n", a, b);             break;         case 4:             a = rand() % 100;             b = rand() % 100;             e = rand() % 100;             n = rand() % 100;             c = rand() %4 ;             while (b == 0)             {                 b = rand() % 100;             }             while (n == 0)             {                 n = rand() % 100;             }             switch (c)             {             case 0:printf("%d/%d + %d/%d =\n", a, b, e, n);                 break;             case 1:                 p = (float)a / (float)b;                 q = (float)e / (float)n;                 if (p < q)                 {                    d = a;                     a = e;                     e = d;                     d = b;                     b = n;                     n = d;                 }                 printf("%d/%d - %d/%d =\n", a,b,e,n);                 break;             case 2:printf("%d/%d * %d/%d =\n", a, b, e, n);                 break;             case 3:                 a = rand() % 100;                 b = rand() % 100;                 e = rand() % 100;                 n = rand() % 100;                 c = rand() % 4;                 while (e == 0)                 {                     e = rand() % 100;                }                 printf("%d/%d / %d/%d =\n", a, b, e, n);                 break;             }         }     }     system("pause"); }
程式運行結果：

二柱子的老師想擴大一下範圍，添加一下真分數的四則運算。

題目要求：能自動產生30道包括分數的100以內四則運算題目。

         能支援整數和真分數。

題目分析：減法運算不能有負數

        除法運算時分母不能為0.

        運用隨機產生函數。

總結：

提高了打代碼的速度及使用C語言編程的熟練度，熟練的運用隨機產生函數。期待下次學習。

 

分數的四則運算