This C++ program give percentage 0% , can someone help?

Question

0.00/5 (No votes)

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#include<iostream>

using namespace std;


int main(){
    int attended,held,percentage;
     

    cout<<"Number of classes attended\n";
    cin>>attended;
    
    cout<<"Number of classes held\n";
    cin>>held;
     
    percentage = (attended / held)*100;
    
    cout<<"your attendace is\n"<<percentage<<"%"<<endl;

    if(percentage>=75){
        cout<<"you are allowed to sit in exams\n";
    }else {
        cout<<"you are not alowed to sit in exams";
    }
}

What I have tried:

i have tried to write percentage formula in different ways,But it din't work.

Posted 20-Aug-21 4:29am

Sohit Rana

Updated 22-May-22 9:08am

v2

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Comments

jeron1 20-Aug-21 10:39am

Try something like,
percentage = ((float)attended / (float)held)*100;

3 solutions

Solution 2

Your percentage calculation involves all integer values, so the calculation is done using integer math. So, for example, if attended=7 and held=24, then (int)7/(int)24 = (int)0. Try instead

C

percentage = (float)attended/(float)held * 100.0;

Posted 20-Aug-21 4:43am

k5054

Solution 3

data type of percentage must be float

#include<iostream>

using namespace std;

int main(){
float attended,held;
float percentage;

cout<<"Number of classes attended\n";
cin>>attended;

cout<<"Number of classes held\n";
cin>>held;

percentage = (attended / held)*100;

cout<<"your attendace is\n"<<percentage<<"%"<<endl;

if(percentage="">=75){
cout<<"you are allowed to sit in exams\n";
}else {
cout<<"you are not alowed to sit in exams";
}
}

try this code this will work 100%

>

Posted 22-May-22 9:08am

Member 15646031

Updated 22-May-22 9:11am

v2

Comments

Tony Hill 22-May-22 15:29pm

Just out of curiosity how do you suggest you solve the original problem if you cannot use floats.

For example can the person attending a class attend 3.5 classes or even more puzzling can you hold 2.5 classes.

Richard Deeming 25-May-22 5:36am

As solution 2, posted eight months before yours, already explained.

Stick to answering new questions unless you have something new to add to the discussion.

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Tony Hill · Accepted Answer · 2021-08-20T04:41:00

Solution 1

Your are dividing one integer by another and expecting a float but the division of one integer by another always result in an integer answer so there is no fractional part to multiply by 100.

Try this

C#

percentage = (attended *100) / held;

Posted 20-Aug-21 4:41am

Tony Hill

Updated 20-Aug-21 4:42am

v3

Comments

Sohit Rana 20-Aug-21 10:59am

float was just a experiment it also didn't worked for (int percentage;).
But (percentage = (attended *100) / held;) worked and now i know my mistake.
Thanks bro✌️