Question

The istime function takes a string as its parameter and return True if the string represent a valid time in the format of hh:mm or hh-mm format. It returns False otherwise.

For example,

istime("12:30"), istime("04-15"), istime("02:09") all return True.

istime("ab:cd"), istime("1234"), and istime("04-98") all return False.

It's critical that you include test case code to show proper testing.

Answer 1

This function takes an array of character as an input parameter and returns True if the string represent a valid time in the format of hh:mm or hh-mm format otherwise returns false.

//the function to check time is valid or not
bool istime(char t[5])
{
//variable declarion
bool flag = false;
int hh, mm;
//check if : or - is present or not in the string
if(t[2] == ':' || t[2] == '-')
{
//variable declaration
int t0, t1, t3, t4;
//convert character to integer value
t0 = t[0] - 48;
t1 = t[1] - 48;
t3 = t[3] - 48;
t4 = t[4] - 48;
hh = t0 * 10 + t1;
mm = t3 * 10 + t4;
//check hour and minute value
if(hh<=24 && mm <=60)
flag = true;
}
return flag;
}