Files

• Define file pointers with

  FILE *fin, *fout;
  
  

• Open file for read (the file must exist)

  fin = fopen("in.dat","r");
  
  

• Open file for write

  fout = fopen("outfile.dat","w");
  
  

• Use file pointers in fprintf and fscanf.

• Close files with

  fclose(fin);
  
  fclose(fout);

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