Thread: Input text files into programs...

How can I have the user input a text files into a c program?

Basically, instead of having a static file such as: fp = fopen("text.txt", "r");...

... how can I have the user input their own file?

Instead of using a literal string as your filename ("inputFile.txt"), have a char array of appropriate size (bigger is better than smaller), and allow them to enter their own filename, into it. scanf("%s, filename) or fgets(filename, sizeof(filename), stdin), will work.

then

Code:

FILE *fp = fopen(filename, "r");

//and check that fp is not null:

if(!fp) {
  printf("\nError opening the %s file\n", filename);
  //etc.
}

I would suggest you to use command line arguments.

Code:

int main(int argc , char *argv[])
{
int *fp;
fp = fopen(argv[1] , "r");
.
.
.
.
return 0;
}

Originally Posted by Sasi Srinivas

I would suggest you to use command line arguments.

Code:

int main(int argc , char *argv[])
{
int *fp;
fp = fopen(argv[1] , "r");
.
.
.
.
return 0;
}

That wasn't the question....