C Program
#include #define LEN 10
char * getnchar(char * str, int n);
int exer1(void)
{
char input[LEN];
char *check;
getchar();
printf("Please enter 9 characters: ");
check = getnchar(input, LEN - 1);
if (check == NULL)
puts("Input failed.");
else
puts(input);
puts("Done.\n");
return 0;
}
char * getnchar(char * str, int n)
{
int i;
int ch;
for (i = 0; i < n; i++)
{
ch = getchar();
if (ch != EOF)
str[i] = ch;
else
break;
}
if (ch == EOF)
return NULL;
else
{
str[i] = '\0';
return str;
}
}
Answer these questions: 1. What is the maximum number of characters you can input?
2. What happens when you enter more than this number?
3. What is passed to the *getnchar() function?
4. What is returned from the *getnchar() function?
5. What happens when you press ctrl-d before any input? Why? (Which line of code effects this?)
6. What change would you need to make to allow the user to enter up to 50 characters into input[].
7. Aside from pressing ctrl-d at the beginning of a line, is there any way to enter less than 9 characters?
