C++第八个点本地运行正确，上传WA

90分代码如下

#include<bits/stdc++.h>
using namespace std;

int main(){
    int s,i,n,m,a,b,c;
    cin>>i;
    char q[20],p[i+1];
    int aa[i],bb[i],cc[i],w[i];
    for(n=1;n<=i;n++){

        w[n]=2;
        cin>>q;
        if(isalpha(q[0])){
            p[n]=q[0];
            cin>>a>>b;          
        }

        else{
            a=atoi(q);
            cin>>b;
            p[n]=p[n-1];
        }
        if(p[n]=='a') m=a+b;
        else if(p[n]=='b') m=a-b;
        else if(p[n]=='c') m=a*b;
        aa[n]=a;
        bb[n]=b;
        cc[n]=m;
        if(a<=0){
            a*=-1;
            w[n]++;
        } 
        if(b<=0){
            b*=-1;
            w[n]++;
        }
        if(m<=0){
            m*=-1;
            w[n]++;
        }
        while(a>=1){
            a=a/10;w[n]++;
        }
        while(b>=1){
            b=b/10;w[n]++;
        }
        while(m>=1){
            m=m/10;w[n]++;
        }
    }
    for(n=1;n<=i;n++){
        cout<<aa[n];
        if(p[n]=='a') cout<<"+";
        else if(p[n]=='b') cout<<"-";
        else if(p[n]=='c') cout<<"*";
        cout<<bb[n]<<"="<<cc[n];
        cout<<endl<<w[n]<<endl;
        }
    return 0;
}