C language programming exercise reference answer Chapter 8 Document (1)

/* 8.5 enter a line of characters from the keyboard and convert lowercase letters to uppercase letters */
# Include "stdio. H"
Void main ()
{
File * FP;
Char ch;
If (FP = fopen ("C: \ ex85.txt", "W") = NULL)
{
Printf ("cannot create file c: \ ex85.txt ");
Exit (1 );
}
Printf ("enter a line of characters \ n ");
While (CH = getchar ())! = '\ N ')
{
If (CH> = 'A' & Ch <= 'Z ')
Ch = ch-32;
Fputc (CH, FP );
}
Fclose (FP );
Printf ("operation successful ");
}
/* 8.7 connect an ASCII file to another ASCII file. Connect the characters in c: \ ex87_1.txt to c: \ ex87_2.txt */
# Include "stdio. H"
Void main ()
{
File * FP1, * fp2;
Char ch;
If (FP1 = fopen ("C: \ ex87_1.txt", "R") = NULL)
{
Printf ("file c: \ ex87_1.txt cannot be opened ");
Exit (1 );
}
If (fp2 = fopen ("C: \ ex87_2.txt", "A") = NULL)
{
Printf ("the file c: \ ex87_2.txt cannot be opened ");
Exit (1 );
}
While (CH = fgetc (FP1 ))! = EOF)
{
Fputc (CH, fp2 );
}
Fclose (FP1 );
Fclose (fp2 );
Printf ("operation succeeded. Open c: \ ex87_2.txt to view the result ");
}