Question

Write a ceil method that takes a single double as an argument and returns an int. The int should be the next highest whole integer (eg 3.14 would return 4). Use math, not built-in Java methods (est. 20 mins) Write a method that takes a string as an argument. If your string is more than 10 letters or less than 1 letter return "Bad number." Otherwise, return the telephone number equivalent of the input. Your return can be of type String. Eg. A, B, or C are 2, D, E, F are 3 etc., "GOCOSC 1046" would return "4626721046" (even better would be "462-672-1046" but not required). Write a brief main method that collects input and shows off your methods.

Answer 1

Here is the ceil method in java for you:

public static int ceil(double c)
{
int x = (int)c;   //Store the integral value of c in x.
if(x == c)       //If the integral part and the original number are equal.
return x;       //Don't increase the number.
else if(x < 0)   //If the Integral part is a negative number.
return x;       //Don't increase the number.
else           //If not, i.e., if it is a positive number.
return x+1;    //Increase the number by 1.
}