C程序从.txt文件中获取每行的第一个单词，并将该单词打印到另一个.txt文件中：某种工作方式还可以打印随机字母

Question

So we have this file called dictionary1.txt and it has words with their pronounciation right next to them. What I want to do is to get the first word from each line and print them onto another txt file that the program creates from scratch. My code does it but it also prints random Chinese letters in between English words, I don't know why.

Here's what the ouput file looks like: https://imgur.com/a/pZthP

(Pronounciations are seperated from the actual words in each line with a blankspace in dictionary1.txt)

My code:

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

int main(int argc, char *argv[]) {
char line[100];
int i = 0;
FILE* fp1 = fopen("dictionary1.txt", "r");
FILE* fp2 = fopen("dictionary2.txt", "w");

if (fp1 == NULL || fp2 == NULL){
    printf("ERROR");
    return -1;
}

while (fgets(line, 100, fp1) != NULL){
    while (line[i] != ' '){
        fputc(line[i], fp2);
        i++;
    }
    i=0;
    fputc('\0', fp2);
}

return 0;
}

I tried fputc('\\n', fp2) as well bu t no matter what I couldn't get onto the next line in the file I created from scratch. I also can't get rid of all the random Chinese letters.

EDIT: I figured it out. The .txt file I was working on was saved in Unicode formatting, which didn't work well with my program. I turned it into ANSI and now it works like a charm.

Answer 1

\\n is not the right line separator on all operating systems and all editors.

If you are editing your txt files on Notepad, try fputs ("\\r\\n", fp2); , where \\r means carriage return (cursor returns at the first character of the line) and \\n new line.

Generally speaking, Windows uses '\\r\\n' as line separator, the '\\n' character is displayed as something else than end line, at least in Notepad. Linux and Mac OS use different line separators. You may also want to try fprintf(fp2, "\\n"); Check this out \\n and \\r seem to work everywhere. Why is line.separator more portable?

If you don't mind using C++, you could try to create an output stream os and write os << endl Note that some compilers may automatically convert '\\n' into the corresponding operating system end line character/caracther sequence, whereas some may not.

Another thing, change the while loop condition into line[i] != ' ' && line[i] != '\\0' and close the file fp2 using fclose .

Answer 2

.txt file was saved using Unicode formatting. I turned it into ANSI and everything was suddenly fixed.