[英]reading words/strings from file+length of them - c
我的c程序有问题,它应该从txt文件读取单词/字符串,然后计算它们的长度。 当我运行程序时,它没有响应
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *f;
char c;
char word[50];
int a,b=0;
if ((f = fopen("file.txt", "r")) == NULL)
{
printf("CANT OPEN THE FILE" "\n");
return 1;
}
while((c=fgetc(f))!=EOF){
if (c==' ')b++;
word[b]=word[b]+c;
}
for (a=0;a<b;a++){
printf("%c ",word[0]);
}
return 0;
}
它应该做到这一点:首先,我打开文件,然后从文件中读取每个字符+将这个字符存储在数组字中,然后当出现空格('')时,应该将字符写入数组的下一个索引,因此单词将在数组的不同索引上创建,然后它应该计算单词的长度,但这应该易于实现,对我的英语感到抱歉
它们与您共享的代码有很多错误:
J没有声明,因此您需要添加int j = 0
; 我假设j是您文档上空白的数字。
word[b]=word[b]+c;
变成word[b]= c;
然后,在循环中的b上添加一个增量,因此您将不会仅在word [0]上进行写操作。
您的打印质量也很差,您只会一遍又一遍地显示第一个字母。
这是最终代码,已更正。 如果文件少于200个角色,它将显示整个文件。 J是空格数。
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *f;
char c;
char word[200];
int a,b=0;
int j = 0;
if ((f = fopen("file.txt", "r")) == NULL)
{
printf("CANT OPEN THE FILE" "\n");
return 1;
}
while((c=fgetc(f))!=EOF){
if (c==' ')j++;
word[b]= c;
b++;
}
for (a=0;a<b;a++){
printf("%c",word[a]);
printf("The file contains %d caracters, and %d whitespaces", b, j);
}
return 0;
}
顺便说下一次 尝试至少编译。 显然,您在提交有关SO的问题之前不费吹灰之力。
#include <stdio.h>
#include <stdlib.h>
#include <string.h> //for string functions
int main()
{
FILE *f;
int c; //c should be an int
char word[50];
char *ptr; //to store each word
int a,b=0;
if ((f = fopen("file.txt", "r")) == NULL)
{
printf("CANT OPEN THE FILE" "\n");
return 1;
}
while((c=fgetc(f))!=EOF){
word[b++]=c;
}
for (a=0;a<b;a++){
printf("%c ",word[a]); //word[a] not word[0]
}
ptr=strtok(word," ");//get first word
a=0;
while(ptr!=NULL)
{
printf("Word %d which is %s is %d letters long",++a,ptr,strlen(ptr));
ptr=strtok(NULL," "); //get next word
}
return 0;
}
the following compiles and meets your description of what needs to be done
#include <stdio.h>
#include <stdlib.h>
#include <string.h> // memset
#define MAX_WORD_LENGTH (50)
struct wordStruct_t
{
char word[MAX_WORD_LENGTH];
};
int main()
{
FILE *fp;
int c;
char word[50]; // assume max word length is < 50
int i = 0; // word byte index
int wordCount = 0; // count of words read
struct wordStruct_t * wordArray = NULL;
char * testArray = NULL;
if ((fp = fopen("file.txt", "r")) == NULL)
{
perror( "fopen failed for read of file.txt");
exit( EXIT_FAILURE );
}
// implied else open successful
memset( word, 0x00, sizeof( word ) );
while((c=fgetc(fp))!=EOF)
{
if( (c!=' ') && (c != '\n') )
{ // then letter to add to current word (should also check for word overflow)
word[i++] = c;
}
else
{ // else, end of word found
// allocate max room for new word
if( NULL == (testArray = realloc( wordArray, sizeof(struct wordStruct_t) * (wordCount+1)) ) )
{
perror( "realloc failed");
free( wordArray );
fclose( fp );
exit( EXIT_FAILURE );
}
// implied else, realloc successful
wordArray = (struct wordStruct_t*)testArray;
strcpy( wordArray[wordCount].word, word );
memset( word, 0x00, sizeof(word) ); // prep for next word
} // end if
} // end while
for (i = 0; i< wordCount; i++)
{
printf("word: %d is %s and contains %d bytes\n",
i,
wordArray[i].word,
(int)strlen(wordArray[i].word ) );
}
free( wordArray );
return 0;
}
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