Wrong Answer.wrong answer On line 1 column 3, read 4, expected +.

#include <iostream>
#include <cctype>
#include <stdlib.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;
}
	

测试点：（同样例） 4 a 64 46 275 125 c 11 99 b 46 64