如题，有哪位大佬帮我看看哪里错了

而且案例1、2在电脑上试过了，都对
测试点也有案例1，就是不对

如果可以的话，还请更改一下

#include<iostream>
#include<string.h>
using namespace std;
inline bool ischar(char a[]){
	int len = strlen(a);
	int sum=0;
	for(int i=0;i<len;++i){
		if(a[i]<='0' || a[i]>='9'){
			sum++;
		}
	}
	if(sum==len) return 1;
	else return 0;
}
inline bool isprime(int n){
	for(int i=2;i*i<=n;++i){
		if(n%i==0){
			return 0;
		}
	}
	return 1;
}
inline void zys(int n){
	cout << n << "=";
	for (int i = 2; i <= n; i++) 
	{
		while (n % i == 0)
		{
			cout << i;
			n /= i;
			if (n != 1)
				cout << "^";
		}
	}
}
int main(){
	long long n=0;
	char str[100005];
	while(1){
		cout<<"Enter the number=";
		gets(str);
		n=0;
		int len = strlen(str);
		if(ischar(str)) break;
		else{
			for(int i=0;i<len;++i){
				if(str[i]>='0' && str[i]<='9'){
					n = n*10+str[i]-'0';
				}
			}
		}
		cout<<"Prime? ";
		if(n>=2 && isprime(n)) {
			cout<<"Yes!"<<endl;
			if(n>40000000){
				cout<<"The number is too large!"<<endl;
				cout<<endl;
				continue;
			}
			cout<<endl;
			continue;
		}else{
			if(n<2){
				cout<<"No!"<<endl;
				cout<<endl;
				continue;
			}else{
				cout<<"No!"<<endl;
			}
		}
		if(n>40000000){
			cout<<"The number is too large!"<<endl;
			cout<<endl;
			continue;
		}
		zys(n);
		cout<<endl;
		cout<<endl;
	}
	return 0;
}

提交记录：
https://www.luogu.com.cn/record/85517141