[英]How to transfer a char * into a 2d char array
我試圖采用一個char *
,它代表一個單詞,我從一個函數中獲得了char *
,並將其放入2d數組中,但是它只是將每個單詞的第一個字母重復幾次。 輸出看起來像這樣
ttttttttttttttttttttttttttttttttvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvoooooooooooooooooooooooooo
而我的輸入文件是
three
versions
of
simple
with
spell
check
checking
program
we
will
write
我不確定如何正確將char *轉換為2d數組,這是我正在使用的所有功能
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <ctype.h>
#include "dict.h"
bool is_valid_entry( int strLength, char entry[] ){
if( entry[0] != '"' && !isalpha(entry[0]) && entry[0] != '\'' ){
return false;
}
strLength--; /* to allow for the zero index of the array*/
for ( int i=1; i < strLength; i++ )
if ( !isalpha( entry[i] ) ){
return false;
}
if (!isalpha( entry[strLength] ) && !ispunct( entry[strLength] ) && entry[strLength] != '"' && entry[strLength] != '\'' ){
return false;
}
return true;/* if the entry passes all of the tests the function will return true meaning the the word is valid*/
}/* ends is_valid_entry( int strlength, char entry[] )*/
char * normalize( int strLength, char entry[], char output[] ){
strLength--;/* to allow for the zero index of an array*/
int j = 0;
for( int i = 0;i < strLength; i++){/* converts all of the elements in the entry[] to lower case*/
if (isupper( entry[i] ) ){
entry[i] = tolower( entry[i] );
}
}
if( ( entry[0] == '"' && entry[strLength] == '"' ) || (entry[0] == '\'' && entry[strLength] == '\'' ) ) {
for(int i=1 ; i < strLength ; i++,j++ ){
output[j] = entry[i];
}
output[j] = '\0';/* removes the last character which is either a '"' ir a '\''*/
return output;/* returns the noramlized word*/
}else if( entry[0] == '"' || entry[0] == '\'' ){
for(int i = 1; j < strLength; i++, j++ ){/*i=1 in order to skip the first element in the entry arrary*/
output[j] = entry[i];
}
output[j] = '\0';
return output;/* returns the noramlized word*/
} else if( entry[strLength] == '"' || ispunct( entry[strLength] ) || entry[strLength] == '\''){
for(int i = 0;j < strLength; i++,j++ ){
output[j] = entry[i];
}
output[j] = '\0';
return output;/* returns the noramlized word*/
}
return entry;/* returns the original array since it does not need to be normalized*/
}/* ends normalize( int strlength, char entry[], char output[] )*/
void load_dict(char *fileName, char dictionary[30000][31]) {
FILE *fdict;
fdict = fopen( fileName, "r" );/* file pointer for the dictionary file*/
char *normDictWord;
char normDict [33];
int strLength,i,j,ch;
if ( fdict == NULL ){
fprintf(stderr,"Could not open file: %s\n", fileName );/*checks to make sure the dictionary file can be opened*/
exit(1);
}
for (i = 0; (ch = fgetc( fdict ) ) != EOF; i++ ) {
char word[33] = "";/* resets the array*/
for (strLength = 0; !isspace( ch ) ; strLength++ ){
word[strLength] = ch;
ch = fgetc( fdict );
}
if (is_valid_entry( strLength , word ) ){
normDictWord = normalize( strLength , word , normDict );/*normalize then do the linear search then print the word if it is not found in the dictionary*/
for(j = 0; j <= 31;j++){
dictionary[i][j] = * normDictWord ;
printf("%c",dictionary[i][j]);
}
}
}
fclose( fdict );
}
我無法完全理解您的代碼,修復格式並添加缺少的部分(否則我無法對其進行測試)。 然而:
dictionary[i][j] = * normDictWord;
應該是這樣的:
dictionary[i][j] = * (normDictWord + j);
或等效地:
dictionary[i][j] = normDictWord[j] ;
關鍵問題(@pez)
for (j = 0; j <= 31; j++) {
// dictionary[i][j] = *normDictWord;
dictionary[i][j] = normDictWord[j];
printf("%c", dictionary[i][j]);
}
其他一些問題:
如果在空格之前出現EOF
條件,原始代碼將無限循環。 isspace(EOF)
為假。 此循環也不能防止超限。
char word[33] = "";
// for (strLength = 0; !isspace(ch); strLength++) {
for (strLength = 0; !isspace(ch) && ch != EOF && strLength < sizeof word; strLength++) {
word[strLength] = ch;
ch = fgetc(fdict);
}
以下內容並不“將entry []中的所有元素都轉換為小寫”,而僅是元素[0 ]... [original_string_length-2]
。 也許代碼應該做strLength--;
后循環。
strLength--;/* to allow for the zero index of an array*/
...
for (int i = 0; i < strLength; i++) {/* */
...
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