c++有关题目

1000:
#include<iostream>
using namespace std;
int  main()
{
    int a,b;
    cin >> a >> b;
    cout << a+b << endl;
    return 0;
}


1002
#include<iostream> 
using namespace std; 
int main() 
{ 
int n,i=0;char c[100];
cout<<"请输入提问的次数:"<<endl;
cin>>n;
cout<<"请输入Y或N："<<endl;
for(i=0;i<n;i++)
{
cin>>c[i];
}
i=0;
while(i<n){
if(c[i]=='Y')
cout<<"现在正在下雨。"<<endl;
else if(c[i]=='N')

cout<<"现在不在下雨。"<<endl;
i++;
}
return 0;
}


1003
#include <iostream>
using namespace std;
int main()
{
int fenshu[100],n,i;
cout<<"请输入提问的次数:"<<endl;
cin>>n;
for(i=0;i<n;i++)
{
cin>>fenshu[i];
}
i=0;
while(i<n){
if(fenshu[i]>100||fenshu[i]<0)
cout<<"分数必须在0-100";
else
{
if(fenshu[i]>=90&&fenshu[i]<=100)
cout<<"优"<<endl;
else if(fenshu[i]>=80&&fenshu[i]<90)
     cout<<"良"<<endl;
else if(fenshu[i]>=60&&fenshu[i]<80)