Question

我是代码强制的初学者。我陷入problem 474 A我遇到运行时错误。但我不能有任何错误。我用C.这是我的代码：

#include<stdio.h>
int main()
{
    int a, i, j, b, arr[102];
    char ch, str2[101], c;
    char str1[30] = "qwertyuiopasdfghjkl;zxcvbnm,./";
    for (i = 0; i<30; i++)
        arr[(str1[i])] = i;
    scanf("%c%s", &ch, str2);
    if (ch == 'R')
    {
        for (i = 0; str2[i]; i++)
        {
            printf("%c", str1[(arr[str2[i]] - 1)]);
        }
        printf("\n");
    }
    else {
        for (i = 0; str2[i]; i++)
        {
            printf("%c", str1[(arr[str2[i]] + 1)]);
        }
        printf("\n");
    }
    return 0;
}

你能找到它的错误吗？

Answer 1

请尝试这一点，如果我正确理解了问题，那就可以了。

// MOLE is typing to the right or to the left of  3 rows of keys
//   qwertyuiop
//   asdfghjkl;
//   zxcvbnm,./
// encoded as:   !qwertyuiop!asdfghjkl;!zxcvbnm,./!
// where '!' detects input errors

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

int main( void )
{
  int i;
  char ch;
  char str2[101];
  char kstr1[50];
  char *poschar;        // pointer to char
  int int_poschar = 0;
  int translated_position = 0;
  int right = 0;
  int left = 0;

  strcpy( kstr1, "!qwertyuiop!asdfghjkl;!zxcvbnm,./!" );

  printf( "\n Please enter R or L and press enter\n" );

  scanf( " %c ", &ch );
  ch = toupper( ch );

  if ( ch == 'R' || ch == 'L' ) ; // good input say nothing
  else
  {
    printf( "\nPlease try again with L or R  ( or l or r ) " );
    exit( 0 );
  }

  printf( "\n Please enter a word and press enter\n" );

  scanf( " %100s", str2 );
  strcpy( str2, strlwr( str2 ) );

  if ( ch == 'R' )
  {
    printf( "\nRIGHT translate:\n%s\n", str2 );
    right = 1;
  }
  else if ( ch == 'L' )
  {
    printf( "\nLEFT translate:\n%s\n", str2 );
    left = 1;
  }

  getchar(  );

  for ( i = 0; str2[i]; i++ )
  {
    poschar = strchr( kstr1, str2[i] );
    if ( poschar != NULL )
    {
      int_poschar = poschar - kstr1;    // find prev pos in array

      if ( right )
    translated_position = int_poschar - 1;
      else if ( left )
    translated_position = int_poschar + 1;
      else
      {
    printf( "\n you've got a bug !" );
    exit( 0 );
      }

      if ( kstr1[translated_position] == '!' )
      {
    if ( right )
      printf( "\n not possible, MOLE wrote 1 key to the right" );
    else
      printf( "\n not possible, MOLE wrote 1 key to the left" );

    getchar(  );
    exit( 0 );
      }
      printf( "%c", kstr1[int_poschar - 1] );
    }               // endif ( poschar != NULL )

  }
  exit( 0 );
}

代码在代码生成中给出运行时错误474 A

1 个答案: