题目地址


注意点:

  • 可以使用OOP的思想.
  • 应当认真理解题目限制条件.

#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstring>
using namespace std;
const int MAXN=5e3;
int cnt;
void printX(int val,int num,bool isFirst){
	if(val==0)return;
	if(val>0&&(!isFirst))printf("+");
	if(abs(val)==1){
		if(val<0)printf("-");
		if(num==1){
			printf("x");
		}else{
			printf("x^%d",num);
		}
	}else{
		if(num==1){
			printf("%dx",val);
		}else{
			printf("%dx^%d",val,num);
		}
	}
}
int a[MAXN];
int main(){
	int n;
	scanf("%d",&n);
	cnt=n;
	if(n==0)return 0;
	for(int i=1;i<=n+1;i++){
		scanf("%d",&a[i]);
	}
	for(int i=1;i<=n;i++){
		bool isFirst=(i==1);
		printX(a[i],cnt,isFirst);
		cnt--;
	}
	if(a[n+1]>0)printf("+");
	if(a[n+1]!=0)printf("%d",a[n+1]);
	printf("\n");
	return 0;
}