Standard Input

I am having issue reading from standard input. In other words I want to run my program like: ./WordCount < Sample.txt

Here is my code:

Code:

---

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


int main(){


FILE * file;
char filename[1000], c;
printf("Enter filename to read\n");
scanf("%s", filename);
file = fopen (filename, "r");
if (file == NULL) {
printf("Invalid File\n");
exit(0);
}
c = fgetc(file);
while (c != EOF){
printf("%c", c);
c = fgetc(file);
}
fclose(file);
return(0);
}

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I have been looking for hours and tried many options. Maybe I was not looking in the right place. I am not sure what I need to change in my code in order to read from standard input. I know that scanf reads from stdin but I want to use the redirection from a file command when running the program.

Cross-posted at Help With STDIN - C And C++ | Dream.In.Code.

Tips for debugging..

1 - Can you open and close the file without an error when you manually put the file name in your code? Does the file exist?
i.e.

Code:

---

...=fopen("c:\\test.txt", "r");

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2 - Can you read one char from the file and print it?

3 - Can you make a loop from step 2?