求商求模運算

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標籤:求商求模運算

這兩種運算總是感覺有點迷糊,現在 撥開烏雲見天日。

對於整型數a,b來說,模數運算或者求餘運算的方法都是:

1.求 整數商: c = a/b;

2.計算模或者餘數: r = a - c*b.

#include <iostream>using namespace std;void div(){printf("5/3: %d",5/3);cout << endl;printf("5/(-3): %d",5/-3);cout << endl;printf("(-3)/8: %d",-3/5);cout << endl;printf("3/(-8): %d",3/-5);cout << endl;}void mod(){printf("5模數3: %d",5%3);cout << endl;printf("5模數-3: %d",5%-3);cout << endl;printf("-3模數5: %d",-3%5);cout << endl;printf("3模數-5: %d",3%-5);cout << endl;}void main(){cout<<"求商運算"<<endl;div();cout<<endl;cout<<"求模運算"<<endl;mod();}

運算結果:


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