（1002 A+B for Polynomials）PAT甲级试题，我的代码为何在提交时运行出错，求帮帮忙

[weixin_45386203]

#include<iostream>
#include<iomanip>
using namespace std;
class Array {
public:
double coe;
int exp;
Array(int x = 0, double y = 0.0) : coe(y) ,exp(x){}
};
int main() {
int m, n, i = 0, j = 0,k=0;
Array* a, * b, c[20];
cin >> m;
a = new Array[m];
for (int i = 0; i < m; i++) {
cin >> a[i].exp >> a[i].coe;
}
cin >> n;
b = new Array[n];
for (int i = 0; i < n; i++) {
cin >> b[i].exp >> b[i].coe;
}
do
{
if (a[i].exp > b[j].exp)
{
c[k].exp = a[i].exp;
c[k].coe = a[i].coe;
i++;
}
else if (a[i].exp < b[j].exp)
{
c[k].exp = b[j].exp;
c[k].coe = b[j].coe;
j++;
}
else
{
c[k].coe = a[i].coe + b[j].coe;
c[k].exp = a[i].exp;
i++, j++;
}
k++;

} while (i < m || j < n);
if(i==m&&j!=n)
for (; j < n; j++, k++)
{
c[k].exp = b[j].exp;
c[k].coe = b[j].coe;
}
else if(j==n&&i!=m)
for (; i < n; i++, k++)
{
c[k].exp = a[i].exp;
c[k].coe = a[i].coe;
}
cout << k << " ";
for (int i = 0; i < k-1; i++)
cout << c[i].exp << " " << c[i].coe<<" ";
cout<< c[k-1].exp << " " << c[k-1].coe<<endl;
delete[] a;
delete[] b;
return 0;
}

[Italink]

因为指数在区间[1,1000]，多项式求和，相同指数可以相加，那么只需要用指数当做数组的下标，直接对对应下标的值进行累加（初始化为0），后面输出即可，你的代码样例没过，没看懂你后面的循环再看嘛
仅供参考

#include<iostream>
using namespace std;
int main() {
	double N[1001] = {0}, m;
	int k, max = 0, tmp, count=0;    //max为多项式的最大指数
	for (int i = 0; i < 2; i++) {
		cin >> k;
		for (int j = 0; j < k; j++) {
			cin >> tmp >> m;
			max = tmp > max ? tmp : max;
			N[tmp] += m;
		}
	}
	for (int i = 0; i <= max; i++) {
		if (N[i] != 0)
			count++;
	}
	cout << count;
	if (count > 0) {
		for (int i = max; i >=0; i--) {
			if (N[i] != 0) 
				printf(" %d %0.1lf",i, N[i]);			
		}
	}
	return 0;
}