Question

为什么在输入数字执行时程序出错，内存不能为written

// Ctest4_03.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "stdio.h"
#include "math.h"
#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
int a[5];
for ( int i = 0; i<5; i++ )
{
a[i] = 0;
}
int x, count = 0;
cin>>x;

while (x)
{
a[i] = x%10;
x = x/10;
count++;
}

for ( i = 4; i>=0; i-- )
{
x += a[i] * pow(10, (4-i));
}

cout<<"这是一个"<<count<<"位数"<<endl;
for ( i = 0; i<5; i++ )
{
cout<<a[i]<<", ";
}
cout<<"\n逆序后结果为："<<x<<endl;

return 0;
}

Answer 1

越界了
while (x)
{
a[i] = x%10;
x = x/10;
count++;
}
改为
while (x)
{
i--;
a[i] = x%10;
x = x/10;
count++;
}