Question

编了一个C++程序，出现**.exe已停止工作，帮忙解决一下，谢谢！

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main()
{

cout<<"Engineering Journal – Gao Wei";
int x;
string in;
char z;
string item[10];
int n=0;
char str[3];
int pin[3];

while (1)
{
cout << "\nEnter your 4 digit pin number:";
getline(cin,in);
cin.ignore(100,'\n');
x=in.length();

if(x==4)
{

strcpy(str,in.c_str());

if(str[0]<'0'||str[0]>'9')
cout<<"invald pin";
else if(str[1]<'0'||str[1]>'9')
cout<<"invald pin";
else if(str[2]<'0'||str[2]>'9')
cout<<"invald pin";
else if(str[3]<'0'||str[3]>'9')
cout<<"invald pin";

else break;
}
else
cout<<"invald pin";
}

pin[0]=str[0]-'0';
pin[1]=str[1]-'0';
pin[2]=str[2]-'0';
pin[3]=str[3]-'0';

while(1)
{

cout<<"Select option ([L]ist Titles, [D]isplay Item, [A]dd Item, [Q]uit): ";
cin>>z;
cout<<endl;
z=toupper(z);

if (z=='L')
{
string s;
ifstream fin("journal.txt");
if(!fin)
{
cout<<"open error"<<endl;
exit(1);
}

int i=1;
while (getline(fin,s))

{

cout<<i<<". "<<s<<endl;
fin.ignore(1000,'\n');
fin.ignore(1000,'\n');
fin.ignore(1000,'\n');
i++;

}

}
if(z=='D')
{
int o;
cout<<"please enter item number: ";
cin>>o;
string t;
ifstream fin("journal.txt");

while (fin.ignore(1000,'\n'))
{

fin.ignore(1000,'\n');
getline(fin,t);
int y=t.length();

for(int z=0;z<y;z++)
{
t[z]=t[z]-pin[z%4];
}
item[n]=t;
fin.ignore(1000,'\n');
n++;
}

cout<<item[o-1]<<endl;
}
}
return 0;
}
有病啊

Answer 1

x=in.length();

if(x==4)
{

strcpy(str,in.c_str());
？？？？？？？？？？？

str的申明是char str[3];

这个错误就能导致崩溃了

Answer 2

代码很长
不爱看
飘过