Question

我正在尝试将字符串添加到现有数组中，但我有点卡住了。我必须检查* word是否已经在数组中，如果不是，那么我必须将它添加到数组中。这是我的代码：

#include <stdio.h>
#include <stdlib.h>
int insert(char *word, char *Table[], int n)
{
    //char *word is the string to be added, *char Table[] is array of strings
    //int n is the return value, which is the number of elements in *Table[]
    int counter = 0
    while(*Table[counter]) //while at Index counter
    {
        if strcmp((*Table[counter], *word) == 0) //if *word at Index counter is true
        {
            return n; //return the amount of strings in the array
            break; //terminate the while-loop
        else
        {
            counter++; //increment the counter to check the next index
        }
    }
}

所以我希望成功检查* word是否已经在数组中，但如果不是，我该如何添加呢？先谢谢你们。

Answer 1

首先关闭你的地方

if strcmp((*Table[counter], *word) == 0) //if *word at Index counter is true
        {
            return n; //return the amount of strings in the array
            break;

break没用，因为一旦return n函数停止。

其次让我们考虑一下，如果我们从未在*Table[]中找到单词，那么while循环应该最终退出吗？因此，如果我们退出while循环

，我们找不到*word的情况编辑：您的编译器应该抱怨此函数，因为它可能会退出while循环，然后函数不返回任何内容，但如果您的编译器没有说出需要打开的任何内容，则指定它返回int编译器警告或使用不同的编译器。

尝试类似的东西。这是未经测试的代码，因此您可能仍需要使用它。

while(*Table[counter]) //while at Index counter
    {
        if strcmp((*Table[counter], *word) == 0) //if *word at Index counter is true
        {
            return n; //return the amount of strings in the array
            break; //terminate the while-loop
        else
        {
            counter++; //increment the counter to check the next index
        }
    }
    *Table[counter] = *word; //Add word to the next available spot in the array
    return 0;
}//End function

Answer 2

请尝试这个，它运行正常并添加到字符串数组。对于初学者来说，最好从简单开始。在这里，我们从5个长度为99的字符串开始我给你留下了一些工作要做。玩得开心。

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

#define MAXSTRINGS 5
#define LENSTRING 99

int insert( char word[], char Table[][99] )  // removed n , could not understand the need.
{
  int counter = 0;

  while ( counter < MAXSTRINGS && strlen( Table[counter] ) )    //while at Index counter and string not empty
  {

    if ( strcmp( Table[counter], word ) == 0 )  //if string was found
    {
      return counter;           //return string position  in array of strings
      break;            //terminate the while-loop
    }
    else
    {
      counter++;        //increment the counter to check the next index
    }

  }// endwhile
  strcpy( Table[counter], word );
  printf( "\n added at %d", counter );
  return(counter);
}

int main(  )
{
  char Table[MAXSTRINGS][LENSTRING];
  int i = 0;
  int answer = 0;

  for ( i = 0; i < MAXSTRINGS; i++ )
    memset( Table[i], '\0', LENSTRING );

  strcpy( Table[0], "a test" );
  strcpy( Table[1], "another test" );

  answer = insert( "test", Table);
  if ( !answer )
    printf( "\n already in file" );
  else
    printf( "\nadded record to position %d in array ", answer );

  getchar(  );

}

C - 将字符串添加到现有数组

2 个答案: