我必须使用二维数组检查回文，我使用了文件但它不起作用

Question

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
#include <stdio.h>
using namespace std;
int second();
main(){
    char myWord[5][20]={second()};
    int x;
    char c;
    ifstream fin;
    ofstream fout;

    fin.open("Palinput.txt");
    fout.open("Paloutput.txt");

    for(int row=0;row < 5;row++)
    {
        for(int col=0;col < 20 ;col++){
            cout<<myWord  [row][col];   

    }
int i, j, flag=0, n ='[=10=]'-1;
for (i=0, j=n; i<j; i++,j--)

statement:
if (myWord[i]!=myWord[j])
{
    flag=0;
    break;
}
else
{
    flag=1;
}
if (flag)
cout<<myWord<<" pallindrome \n ";
else
cout<<myWord<<" not palindrome \n ";
        }

    return 0;
}
int second(){
    ofstream thefile("Palinput.txt");
    cout<<"Press enter after each word entered!\n";
    cout<<"Enter 5 string \n"<<endl;

    string txt;
int a;
for(a=0;a<=4;a++)
{
    cin>>txt;   
}
cout<<"Press ctrl+z to continue\n";
}

Answer 1

如果你适当地缩进，很多事情就会变得很明显，并且更容易跟踪正在发生的事情。请参阅我在下面添加到您的代码中的一些评论。但总体概述是您要求输入但从不存储它们，只是简单地覆盖它们。然后你尝试通过比较它的行和列来检查一个空的 char[][] 是否是回文。您的代码有重大问题。您应该使用 visual studio 或 gdb 之类的调试器来单步执行代码以查看发生了什么。这样您就可以了解您在代码设计中犯了哪些错误。

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
#include <stdio.h>
using namespace std;
int second();
main()
{
    char myWord[5][20]={second()};//this isnt assigning to myWord
    int x;
    char c;
    ifstream fin;
    ofstream fout;

    fin.open("Palinput.txt");//opening file but not doing 
    fout.open("Paloutput.txt");//anything with it

    for(int row=0;row < 5;row++)
    {
        for(int col=0;col < 20 ;col++)
        {
            cout<<myWord  [row][col];//myWord has nothing in it

        }
        int i, j, flag=0, n ='[=10=]'-1;
        for (i=0, j=n; i<j; i++,j--) //unused for loop

        statement: //unused label
        if (myWord[i]!=myWord[j])//how is a row=column? always true
        {
            flag=0;
            break;
        }
        else
        {
            flag=1;
        }
        if (flag)
            cout<<myWord<<" pallindrome \n ";
        else
            cout<<myWord<<" not palindrome \n ";
    }

    return 0;
}
int second()
{
    ofstream thefile("Palinput.txt"); //file never opened 
    cout<<"Press enter after each word entered!\n";
    cout<<"Enter 5 string \n"<<endl;

    string txt;
    int a;
    for(a=0;a<=4;a++)
    {
        cin>>txt; //simply overwriting a variable with new input
                  //without using the input
    }
    cout<<"Press ctrl+z to continue\n";
}

我必须使用二维数组检查回文，我使用了文件但它不起作用

I've got to check palindrome using 2D array,i've used files but its not working

c++

palindrome

c++11