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寫一個程式讀入四個整數a,b,c,d. 計算以(a,b)及(c,d)為兩對角頂點的長方形面積. 若(a,b)及(c,d)是水平或是垂直物共線則面積為0.

Sample Input:

-1 5 6 -3

Sample Output:

56

 

參考書籍:由片語學習C程式設計
[Normal] Coding (C) - asked in Introduction to Computer Programming I (C) by (20.9k points)
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#include <stdio.h>
#include <stdlib.h>

int main()
{
* ** * * * * * * a1,b1,a2,b2,s;
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* * * ***** * ** * * * * * * * ** **** *
** * ** **** ** * * * *** * ***
** ** ** ** ** * ** * * * *
* * ** * * ** **** ** ***
** * **** ** ****
**** * * * * * ** ** **** *** * ***** *
* ** * *** * * *** * ** 0;
}
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Case 0: Correct output
Case 1: Correct output
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