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lab 1 - soln

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This commit is contained in:
Peter 2023-08-03 19:02:17 +00:00
parent 5889ce58f7
commit 60356de304
1 changed files with 22 additions and 20 deletions
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42
lab01-leap-year/test_leap.c
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@ -6,24 +6,20 @@
/* return 0 (false) or 1 (true), depending on whether
* `year` is a leap year or not.
*/
int is_leap(long year) {
if (year % 4 != 0) {
return 0;
}
if (year % 100 == 0) {
return 1;
}
return 0;
int is_leap(long year)
{
return year % 4 == 0 // Every year that is exactly divisible by four is a leap year
&& (year % 100 != 0 // except for years that are exactly divisible by 100
|| year % 400 == 0); // but these centurial years are leap years if they are exactly divisible by 400
}
int main(int argc, char **argv) {
int main(int argc, char **argv)
{
argc--;
argv++;
if (argc != 1) {
if (argc != 1)
{
fprintf(stderr, "Error: expected 1 command-line argument (a YEAR), but got %d\n", argc);
exit(1);
}
@ -35,19 +31,25 @@ int main(int argc, char **argv) {
long year = strtol(argv[0], &end, 10);
int res_errno = errno;
if (end == argv[0]) {
if (end == argv[0])
{
fprintf(stderr, "Error: couldn't interpret '%s' as a number\n", argv[0]);
exit(1);
} else if (res_errno == ERANGE) {
}
else if (res_errno == ERANGE)
{
fprintf(stderr, "Error: '%s' is outside the range of numbers we can handle\n", argv[0]);
exit(1);
} else {
if (is_leap(year)) {
}
else
{
if (is_leap(year))
{
printf("%ld is a leap year\n", year);
} else {
}
else
{
printf("%ld is not a leap year\n", year);
}
}
}