Page 21 - PROGRAMMING IN C_Neat

7. getw():
 Used to read an integer value from a file.
 Example:
int n;
n = getw(fptr);

8. putw():
 Used to write an integer value to a file.
 Example:
putw(6, fptr);

9. fscanf():
 File scanf().
 Used to read data from a file.
 Example:
fscanf(fptr, “%d %s %f”, &rollno, name, &percentage);

10. fprintf():
 File printf().
 Used to write data to a file.
 Example:
fprintf(fptr, “%d %s %f”, rollno, name, percentage);
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13. Explain the important functions available in <ctype.h> header file. OR Explain the character
oriented functions. *

Character Oriented Functions:
 Character oriented functions are stored in the ctype.h header file.

1. isdigit():
 Used to check whether a given character is a digit or not.
 General Form:

int isdigit(c);

 Example 1:
c = ‘6’; Output:
int n = isdigit(c); n = 1 (non-zero)

 Example 2:
c = ‘K’ Output:
int n = isdigit(c); n = 0

2. isalpha():
 Used to check whether a given character is an alphabet or not.
 General Form:

int isalpha(c);

 Example 1:
c = ‘K’; Output:
int n = isalpha(c); n = 1 (non-zero)