Minute Program output problems

**Cobalt** · 10-11-2003

Hey, i'm just learning c++ and a program i wrote awhile ago i am going back to fix and am having problems.

Specs: obtain minutes from user then output as hours:minutes
example: input 327 from user output 5:27

problem i'm having is if they input 302 etc. i get 5:2 rather than 5:02 or if they put 300 minutes it comes out with 5:0

My book says it's possible and says (hint: Use the modulus operator)

what i have:
===========================

Code:

#include <iostream.h>

int main ()
{
	int minutes;
	
	cout << endl;
	cout << endl;
	cout << "\tEnter the number of minutes: ";
	cin >> minutes;



	cout << "\tThis is " << (minutes/60) << ":" << (minutes%60);

	cout << endl;
	cout << endl;
	cout << endl;
	cout << "\t";
	return (0);
}

**Lynux-Penguin** · 10-11-2003

Code:

#include <iostream.h>

int main ()
{
	int minutes;
	
	cout << endl;
	cout << endl;
	cout << "\tEnter the number of minutes: ";
	cin >> minutes;



	cout << "\tThis is " << (minutes/60) << ":";
	if((minutes%60)<10)
		cout<<"0"<<minutes%60;
	else
		cout<<minutes%60;

	cout << endl;
	cout << endl;
	cout << endl;
	cout << "\t";
	return (0);
}

-LC

**Cobalt** · 10-11-2003

Thanks for that speedy response man i was pretty suprised, but i can't use if else statements or any if type statements says i am able to do it with simply using mod

**Lynux-Penguin** · 10-11-2003

i dont think you can because the '0' won't be included if it's less than 10 no matter what, but if it explicitly says just ifs and elses try:

Code:

#include <iostream.h>
#include <iomanip.h>
int main ()
{
	int minutes;
	
	cout << endl;
	cout << endl;
	cout << "\tEnter the number of minutes: ";
	cin >> minutes;



	cout << "\tThis is " << (minutes/60) << ":";
	minutes%60<10 ? cout<<"0"<<minutes%60 : cout<<minutes%60;


	cout << endl;
	cout << endl;
	cout << endl;
	cout << "\t";
	return (0);
}

-LC

**XSquared** · 10-11-2003

Code:

#include <iostream> //iostream, not iostream.h
#include <iomanip> // for setw

using namespace std;

int main ()
{
	int minutes;
	
	cout << endl;
	cout << endl;
	cout << "\tEnter the number of minutes: ";
	cin >> minutes;



	cout << "\tThis is " << (minutes/60) << ":" << setw( 2 )<< (minutes%60);

	cout << endl;
	cout << endl;
	cout << endl;
	cout << "\t";
	return (0);
}

**Lynux-Penguin** · 10-11-2003

XSquared is right but that doesn't output a 0 it just has a space.

-LC

**XSquared** · 10-11-2003

Code:

cout << "\tThis is " << (minutes/60) << ":" << setfill( '0' ) << setw( 2 )<< (minutes%60);

**Lynux-Penguin** · 10-11-2003

wow, i'll be darned there is a way. I didn't know about setfill tho. hmm, that could prove usefull.

-LC

**Cobalt** · 10-11-2003

Write a program that allows the user to enter a time in minutes
and then displays the time in hours:minutes format. The program output should look similar to:

Enter teh number of minutes: 327
This is 5:27

Be sure toe consider ime where the number of minutes left over is fewer than 10. For example, 184 minutes should display 3:04. (Hint: use the modulus operator.)

This is the actual problem that is in my textbook, it is in the lawrenceville press A guide to programming in C++ book, and because it says use modulus operator it makes me think i have to use it 2x's or something but it's in chapter 3 of the book so it's simple stuff no other binaries or if statments etc. so it must be possible since it's a published problem in a educational textbook.

**jlou** · 10-11-2003

Code:

int num = 502;
int digit = num % 10;
// Right now: digit = 2;

num = num / 10;
digit = num % 10;
// Right now: digit = 0;

num = num / 10;
digit = num % 10;
// Right now: digit = 5;

Does that help?

**Lynux-Penguin** · 10-11-2003

other than that it's not
0 will never appear before a number without a special flag set or a function to output it as such. Or an IF statement.

[edit]: I am again proven wrong!

-LC

**Cat** · 10-12-2003

Well, you could always do:

cout << "\tThis is " << (minutes/60) << ":" << ((minutes%60)/10) << ((minutes%60)%10);

**Cobalt** · 10-12-2003

Thanks for the awesome help guys i really appreciate it, it works great now, glad i've found somewhere i can get help if i need it.

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