23 lines
590 B
C++
23 lines
590 B
C++
#include <bits/stdc++.h>
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using namespace std;
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/**
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功能：正数+负数取模
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n=3为例
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MOD就是一直0,1,2,0,1,2这样的向下走，不会乱了规矩
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MOD 0 1 2 0 1 2 0 1 2
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@ @ @ @ @ @ @ @ @
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a -3 -2 -1 0 1 2 3 4 5
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*/
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int MOD(int a, int b) {
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return (a % b + b) % b; //配合数组下标从0开始合适
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}
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int main() {
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int n = 5;
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for (int a = -4; a <= 2; a++) {
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cout << "a=" << a << " MOD=" << MOD(a, n) << endl;
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}
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return 0;
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} |