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P1067 polynomial output (string & details)

2021-08-10 08:04:23 wx6110fa547fd20

P1067 Polynomial output ( character string & details )

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The question : Given a dollar n Polynomial of degree n+1 A coefficient of , Output the polynomial .

Ideas :detail1: Pay attention to judgment an and a0.
detail2: The absolute value of the coefficient is 1 and 0 The situation of .
detail3: And the index is 1 The situation of .
detail4: If it is not the positive number of the first coefficient, add ’+‘

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,x;
	cin>>n;
	string s="";
	cin>>x;
	if(x>0){ // For the first special judgment  
		if(x!=1) s+=to_string(x);
	}
	else if(x<0){
		if(x!=-1) s+=to_string(x);
		else s+='-';
	}
	s+="x^"+to_string(n);
	for(int i=1;i<n;i++){
		cin>>x;
		if(!x) continue;
		if(x<0){
			if(x==-1) s+='-';
		 	else s+=to_string(x);
		 	   }
		else {
			s+='+';
			if(x!=1) s+=to_string(x);
			}
		s+="x";
		if(n-i!=1) s+='^'+to_string(n-i);// The special judgment index is 1 The situation of  
	}
	cin>>x;
	if(x>0) s+='+'+to_string(x);  // The last item of special judgment . 
	else if(x<0)  s+=to_string(x);
	cout<<s<<endl;
	return 0;
}

      
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