isascii()

Header file:

    ctype.h

Synopsis:

    int isascii (int input)

Description:

    Checks whether the given input is a 7-bit unsigned char value that fits into the ASCII character set.

Return Value:

    TRUE(non-zero value) on success

    0 on failure.

Sample Program:

---

  #include<stdio.h>
  #include<ctype.h>
  int main() {
        char c;
        printf("Enter your input:");
        c = getchar();

        if (isascii(c))
                printf("Given input is a 7 bit unsigned char\n");
        else
                printf("not an unsigned char that fits the ascii char set\n");

        printf("Return value for isascii: %d\n", isascii(c));
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/cpgms$ ./a.out
  Enter your input:Q
  Given input is a 7 bit unsigned char
  Return value for isascii: 1