Making a command line application from a C program [closed] - c

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How do I convert this program(binary.c) into a command line application so it can read any binary text (e.g. binary1.txt) file and then convert it to ASCII? For example I want to do:
./binary < binary1.txt
and it should print
Hello World!
at the command line.
This is my program:
#include <stdio.h>
#include <stdlib.h>
int main()
{
FILE *f_ptr;
f_ptr = fopen("binary1.txt", "r");
if (f_ptr == NULL){
printf("Error opening binary1.txt");
return 1;
}
while(1){
int ch = fgetc(f_ptr);
if(ch == EOF)
break;
printf("%c",ch);
}
fclose(f_ptr);
return 0;
}

Answer 1

I am not sure what you are asking. I guess you need to compile your source using a compiler. If you are using Linux you could do:gcc binary.c -o binary to get an executable file...

Answer 2

#include <stdio.h>
int main(int argc, char *argv[]){
FILE *fp;
if(argc < 2)//./binary < binary1.txt
fp = stdin;
else {//./binary binary1.txt
if((fp=fopen(argv[1], "r")) == NULL){
perror("fopen");
return 1;
}
}
int ch, count = 0;
unsigned char out = 0;
while((ch = fgetc(fp))!=EOF){
if(ch == '1' || ch == '0'){
out <<= 1;
out += ch - '0';
if(++count == 7){//7bit code
printf("%c", out);
count = out = 0;
}
}
}
puts("");
fclose(fp);
return 0;
}

Answer 3

From what I understand you are trying to pass the filename to your program and not sure how to do that. In that case you might want to do this
int main(int argc, char* argv[])
{
if(argc>1)
std::string filename = argv[1];
//now you have the file in the filename
// your code
return 0;
}
so when you execute just do this
./binary binary1.txt
you don't need to use < and I am assuming that both your executable and text file are in the same directory