C - How to prompt user to enter filename

Very new to C programming. I'm writing a program where I want to prompt the user to input the name of the file to be open for reading. On my code shown bellow I want to throw an error if it doesn't open or if the file doesn't exist, but when I run it, my code blows up and I have to close the program (DOS)

/*ask user for the name of the file*/
   printf("enter file name: ");
   gets(fname);
 
 
 //Opens the file from where the text will be read. 
 fp=fopen(fname, "r");
 
 //Checks if the file us unable to be opened, then it shows the error message 
 if (fp == NULL)
     {
      printf("\nError, Unable to open the file for reading\n");
     }
 

// you can test this by creating a name.txt file. Please let me know if you need additional information.

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