[SOLVED] Why my output is anyway 50?

Question

My exersice say:

You are working on a ticketing system. A ticket costs $10.
The office is running a discount campaign: each group of 5 people is getting a discount, which is determined by the age of the youngest person in the group.
You need to create a program that takes the ages of all 5 people as input and outputs the total price of the tickets.

Sample Input:
55
28
15
38
63

Sample Output:
42.5

The youngest age is 15, so the group gets a 15% discount from the total price, which is $50 - 15% = $42.5

My code is:

#include <iostream>
using namespace std;

int main() {
int ages[5];

for (int i = 0; i < 5; ++i) {
cin >> ages[i];
}
//your code goes here
int youngest = ages[0];
for (int a = 0; a <5; ++a)
{
if(youngest>ages[a])
{
youngest = ages[a];
}
}

int prezzo = 50 - 50/100 * youngest;
cout << prezzo;
return 0;
}

/*My output is 50 and I don't understand why. I try many solution*/

Answer 1

Alexander Thomson

In your case 50/100 will give 0. That's why output is 50 - 0 = 50

To get in decimal you need to cast int to double or do like this

double prezzo = 50.0 - 50.0/100.0 * youngest;

Answer 2

Liza Cali this is the solution founded (is working)

CODE:

#include <iostream>
using namespace std;

int main() {
int ages[5];

for (int i = 0; i < 5; ++i) {
cin >> ages[i];
}

double youngest = ages[0];
for (int a = 0; a <5; ++a)
{
if(youngest>ages[a])
{
youngest = ages[a];
}
}

double prezzo = 50 - (50*youngest/100);
cout << prezzo;

return 0;
}

Answer 3

#include <iostream>
using namespace std;

int main() {
// Group of 5 peoples is declared here//
int ages[5];

// A for loop for looping 5 indexes for group //
for (int i = 0; i < 5; ++i) {
cin >> ages[i]; // Input will be taken in 5 looped indexes
}
// Input has been taken here //

//your code goes here

/* here we declared a variable named youngest as double
which will be equal to the first input entry of ages group */
double youngest = ages[0];

/* Another loop for inputed ages group to detect whether
youngest is really youngest or not */
// it will just compare youngest with every entry //
for (int a = 0; a <5; ++a)

{ // comparing youngest over every entry //
if(youngest>ages[a])/* If youngesy is greater than
a corresponding entry */
{
youngest = ages[a]; // Youngest == That Entry.
// Means That enciuntered entry will be real youngest.
// We declared that entry as younngest.
}
}

// Rest is just the simple Maths //
double discont = 50 - (50*discount/100);
cout << discount;

return 0;
}

Answer 4

Ok.. I don't understand what happened.. I try to change the method

Prezzo = 50 - (50*yoingest/100);

The result is near to be correct because the output can be decimals number. So I change the integer to double and it work correctly.

Now the question is why my method don't work?
Before to post I have yet try to do

double prezzo = 50 - (50/100*youngest)

But that still output 50 or 0 I don't remember

Answer 5

Sorry I’m blind. I didn’t see that youngest was declared “double” 😜

Answer 6

The Outputs Are working

#include <iostream>
using namespace std;

int main() {
int ages[5];

for (int i = 0; i < 5; ++i) {
cin >> ages[i];
}

double youngest = ages[0];
for (int a = 0; a <5; ++a)
{
if(youngest>ages[a])
{
youngest = ages[a];
}
}

double prezzo = 50 - (50*youngest/100);
cout << prezzo;

return 0;
}

Answer 7

LUCI- FOR
mustafa khlid
Doyal Roy
مهدي حميد

https://www.sololearn.com/discuss/1316935/?ref=app

Answer 8

can anyone explain how to calculate that discount thing?

Answer 9

#include <iostream>
using namespace std;

int main() {
int ages[5];

for (int i = 0; i < 5; ++i) {
cin >> ages[i];
}

double youngest = ages[0];
for (int a = 0; a <5; ++a)
{
if(youngest>ages[a])
{
youngest = ages[a];
}
}

double prezzo = 50 - (50*youngest/100);
cout << prezzo;

return 0;
}

Good Luck

Answer 10

#include <iostream>
using namespace std;

int main() {
int arr[5];

for (int i = 0; i < 5; ++i) {
cin >> arr[i];
}
//your code goes here

int min=arr[0];

for(int i=0; i<5;i++)
{
if(arr[i]<min)
{
min=arr[i];
}

}

int tickets_Price=10;
int size=sizeof(arr)/sizeof(arr[0]);
int price= tickets_Price*size;

double discount= price*min*0.01;

double final_Price= price-discount;

cout<< final_Price;
return 0;
}

Answer 11

Type Conversion might be the solution
Use ` double prezzo `
0.5 is converted to 0 in ` int `

Answer 12

I Am Groot !

I tried

double b = 50 - 50 / 100 * youngest;

but don't work, maybe the problem is I don't have write 50.0?

Answer 13

Alexander Thomson Yes

Answer 14

Alexander Thomson Check this again

double prezzo = 50.0 - 50.0/100.0 * youngest;

Answer 15

I Am Groot !
Sandeep Shaw
Aysha Simra

Thanks all you so much for helping me 😁

Answer 16

Aysha Simra yea now is all clear, I understand my mistake 😁

Answer 17

Alexander Thomson
Keep learning
You are going great

Answer 18

Liza Cali if I begin the second loop with 1 the loop will be executed only 4 time

for(int a=1; a<5 ;++a)

About the error is yet found and is not the syntax but the type of variable I used. In this case we need a double variable and not a integer. Because during the calculations we have a decimals number and the final valor of the variable can be a decimal number 😁

Answer 19

Liza Cali She already solved the problem. Youngest should be int not double

Answer 20

Great job Alexander!😄