Need Help with fscanf, a bit confused

I just started doing programming, and have been trying to self-learn and i have hit some obstacles. Maybe someone can help?

In data in/out onto a text file;
To put something onto a text file, I know, we can use fprintf; For example, if i want to open a file named test, and want to put "hello hi" into it, I can use the following code:

Code:

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#include <stdio.h>
int main()
{
    FILE *myfile;
    myfile=fopen("test.txt", "w");
    fprintf(myfile, "Hello Hi \n");
    fclose (myfile);
   
    return 0;
}

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But, what if I wanted the user to input something, then i put that something in the text file. For example: I ask the user for his name, he inputs: "John Deere". How do i put "John Deere" into the text file?

I would really appreciate the help, if anyone can write me a simple code for that scenario. Thanks a lot in advance.

Here is one possible way with a few improvements.

Code:

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#include <stdio.h>

#define DIM 512

int main()
{
  FILE *myfile = NULL;  // Initialize all local variables.
  char buff[DIM]= "";

  myfile=fopen("test.txt", "w");
  if(myfile == NULL)  // Always test if the file was opened
  {
      printf("File open failed! Exiting.");
      return 1;  // EXIT_FAILURE in stdlib.h is better
  }

  printf("Please enter a name: ");
  fgets(buff, DIM, stdin);

  fprintf(myfile, "%s\n", buff);

  fclose (myfile);

  return 0;  // EXIT_SUCCESS here as well
}

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