C 中无法打印最大行

Question

该程序应该打印出所有输出中最长的行。但是该程序的行为非常奇怪。有时，即使触发 EOF(ctrl+Z)，它也不会终止，有时它会打印空白或奇怪的符号。我不知道为什么它不起作用；有人可以帮我解决这个问题吗？

//START
#include <stdio.h>
#include <stdlib.h>
#define mx 100
int main(void)
{
    int line[mx],lng[mx],c,word,maxim;
    word=1;
    maxim=10;
    int i=0;
    while((c=getchar())!=EOF)
    {
      while((c=getchar())!='\n')
      {
        line[i]=(c=getchar());
        if(((c=getchar())==' ') || ((c=getchar())=='\t'))
           {
            word++;
           }
         i++;
      }
      if(woasdrd>=maxim)
        {
          for(int d=0;d<=99;d++)
         {
            copyline(lng[d],line[d]);
         }
         word=1;
         i=0;
        }
    else
    {
      i=0;
    word=1;
    } 
    }
for(int g;g<=99;g++)
{
    putchar(lng[g]);
}
}
copyline(int to[],int from[])
{
 for(int i=0;i<=99;i++)
  {
        to[i]=from[i];
    }
}
//END

Answer 1

#include <stdio.h>
#include <stdlib.h>

#define mx 100

//copy string array from from[] to to[],and both of it is end with '\0'    
void copyline(char to[],char from[])
{
    int i = 0;
    while( from[i] )     
    {
        to[i]=from[i];
        i++;
    }
}

int main(void)
{
    char line[mx] = { ' ' },lng[mx] = { ' ' }; //line keep the line you just input,lng keep the longest line
    int maxim , c;                             //maxim keep the longest num of longest line
    int i=0;

    maxim=0;

    //get input from stdin ,if EOF then end(Ctrl + C or Ctrl + d is EOF)
    while( ( c = getchar() ) != EOF )
    {
        //if you input a Enter then compare it's length with maxim
        if( c == '\n' )
        {
            line[i++] = '\0';          //turn '\n' into '\0',for string end with '\0'

            if( i > maxim )            //compare the line you just input with the longest line,if get longer one,copy it to lng
            {
                maxim = i;
                copyline( lng , line );
                lng[ i ] = '\0';       //for string end with '\0'
            }
            i = 0;                     //if you get a '\n' ,then you should be ready for next input line,so i = 0,and continue for new get
            continue;
        }
        line[i++] = c;              //keep input to line
    }

    //that's output,for string end with '\0',so put it as condition for while loop
    i = 0;
    while( lng[i] )
    {
        printf("%c",lng[i++]);
    }
    printf("\n");
}

也许这就是你想要的，一开始我想改进你的代码，但是它有很多错误，包括逻辑和代码，所以我重写了你的代码。如果你对此代码有问题，请告诉我。