Fprintf and fscanf read and write garbled characters

I was killed when I was writing a Linux file system a few days ago. Today I finally understood it.

This is the CPP File

# Include

# Include

# Include

# Include

Using namespace STD;

Char ch [250];

Struct s {

Short A, B;

};

Int main (){

File * file = fopen ("test.txt", "WT + ");

S st;

St. A = 1, st. B = 2;

Fseek (file, 0, 0 );

Fwrite (& St, sizeof (short), sizeof (ST)/sizeof (short), file );

// Fseek (file, 0, 0 );

// Fread (& St, sizeof (short), sizeof (ST)/sizeof (short), file );

Char temp [256] = "flaf ";

Int C = 0x11110011;

Fseek (file, sizeof (ST), 0); // The result of adding this sentence is different.

Fprintf (file, "% s", temp );

// Fputs (temp, file );

Fwrite (& C, sizeof (INT), 1, file );

Fseek (file, sizeof (ST), 0 );

// Fgets (temp, sizeof (temp), file );

Fscanf (file, "% s", temp );

Fread (& C, sizeof (INT), 1, file );

Cout <temp <"" <C <Endl;

Fclose (File );

System ("pause ");

Return 0;

}

First write a struct in the file, then write a string "flat", and then write an INI-type integer c

When reading a string, the result is followed by garbled characters, and integer c is always correct and sometimes incorrect.

There is a key point here, but I have never realized that the string Terminator \ 0 won't actually be printf in fprintf, just as you can't see the \ 0 on the screen, fprintf just reflects the screen effect to the file.