输入两个数,如果它们都是正数,输出它们的和;如果它们都是负数,输出它们的积;否则输出它们的差。
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#include <iostream>
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using namespace std;
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int main()
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{
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int a, b;
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int outnum; // 输出的数字
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cout << "请输入两个整数: ";
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cin >> a >> b;
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outnum = a > 0 ? (b > 0 ? a + b : a - b) : (b < 0 ? a * b : a - b);
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cout << outnum << endl;
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return 0;
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}
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