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最佳答案:#include#includeusing namespace std;int main(){double x,y;cout
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最佳答案:#include#define N 9void main(){int i,j,a[N][N]={0};for(i=1;i
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最佳答案:void fangcheng(double a,double b,double c){double x1,x2;double delta=b^2-4*a*c;i