C: File Processing

fopen() to open a file
fopen("filename", "mode")
modes:
'r' to read
'w' to write
'a' to append data
'r+' to read/write
'w+' to read/write
'a+' to read/append
'rb' to read (binary)
'wb' to write (binary)

fclose() to close a file

fcloseall() to close all files

fgetc() to read one character from a file

fputc() to write one character to a file

fgets() to read a line from a file

fputs() to write a line to a file

fscanf() to read from a file with scanf()

fprintf() to write to a file with printf()

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Juanda P. G.