如何比较C中文本的字符？

Question

I've a simple program that read all the text file characters and during the reading, it excludes some characters.

Here an example to make it clear

This is the content of my txt file:

a b c d e e
f g d h i j 
d d d e e e

I want to remove the character 'd' and the space after it to get this result:

a b c e e
f g h i j 
e e e

My program didn't remove the character 'd' and its space after it reads.

This is the code I'm using to open and read the txt file:

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

int main(int argc, char *argv[]) 
{
    if(argc==2)
    {
        FILE *file;
        file = fopen( argv[1], "r" );
        int c;
        char x = ' ';

        if (file == NULL) 
        {
            printf("Error\n");
            return 1;
        }

        while(x != 'd')
        {
            c = fgetc(file);
            if( feof(file) )
            { 
                break ;
            }
            printf("%c", c);
        }

        fclose(file);
    }
    return 0;
}

Answer 1

Just use an if for conditional print.

Also, make your infinite loops obvious.

Answer 2

You can skip the space by simply doing an fgetc.

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

int main(int argc, char *argv[]) 
{
    if(argc==2)
    {
        FILE *file;
        file = fopen( argv[1], "r" );
        int c;

        if (file == NULL) 
        {
            printf("Error\n");
            return 1;
        }

        while((c = fgetc(file)) != EOF)
        {
            if(c == 'd')
            {
                fgetc(file); // Skip space
            }
            else
            {
                printf("%c", c);
            }
        }

        fclose(file);
    }
    return 0;
}