#include<bits/stdc++.h>
using namespace std;
struct bignum{
	int num[100010]={};
	int len;
}a,c;
int b;
string sa,sb;
void mydiv(bignum &a,int &b,bignum &ans){
	int tmp=0;
	bool flag=1;
	for(int i=0;i<a.len;i++){
		tmp=tmp*10+a.num[i];
		if(flag){
			if(tmp/b) ans.num[ans.len]=tmp/b,ans.len++,tmp%=b,flag=0;
		}
		else ans.num[ans.len]=tmp/b,ans.len++,tmp%=b;
	}
	if(ans.len==0) ans.len=1;
}
int main(){
	cin>>sa>>sb;
	a.len=sa.length();
	for(int i=0;i<sa.length();i++) a.num[i]=sa[i]-'0';
	cin>>b;
	mydiv(a,b,c);
	for(int i=c.len-1;i>=0;i--) cout<<c.num[i];
	return 0;
}

Runtime Error.
Received signal 8: Floating-point exception

bdfs无果，把代码喂给AI得到的全都是wyy,球球了