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3-14、复数的乘法 题目描述:输入2个复数,实现其乘法运算 输入:分别输入2个复数的实部和虚部,不含实部/虚部的部分以0表示 输出: 输出两复数乘法运算结果中的实部 样例输入:2 3 4 5 样例输出:-7 提示: (a+bi)*(c+di)=ac+adi+bci+bdi*i=(ac-bd)+(ad+bc)i // i*i=-1
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