Mencari Mean,Modus,Median

Latihan no 2

1. Identifikasi masalah 

=> mencari mean, modus dan median.

2. Menentukan input dan output 

mean : for(i=0;i<n;i++)

sum=sum+array[i];

median :  for(i=0;i<n;i++)

for(j=i+1;j<n;j++)

modus : 3*median_function(a,n)-2*mean_function(a,n)

3. Membuat Flowchart

4. Test menggunakan data

Median :

1 1 2 2 2 3 4 5 5

f[1]=2
f[2]=3
f[3]=1
f[4]=1
f[5]=2

5. Implementasi C++

source code :

#define SIZE 100
#include<iostream>
using namespace std;
float mean_function(float[],int);
float median_function(float[],int);
float mode_function(float[],int);

int main()
{

int i,n,choice;

float array[SIZE],mean,median,mode;
char a;
    a='b';
    while(a=='b')
    {
system ("cls");
cout<<"===========================";
cout<<"\nPROGRAM MEAN, MEDIAN, MODUS\n";
cout<<"===========================\n";
cout<<"Masukan jumlah data = ";
cin>>n;
cout<<"=======================\n";
cout<<"data\n";
cout<<"=======================\n";
for(i=0; i<n; i++)

cin>>array[i];

do
{

cout<<"\n\tEnter pilihan\n\t1.Mean\n\t2.Median\n\t3.Mode\n\t4.Exit\n";
cin>>choice;
switch(choice)
{

case 1:

mean=mean_function(array,n);
cout<<"\nMean ="<<mean;
break;

case 2:

median=median_function(array,n);
cout<<"\n\tMedian = "<<median;
break;

case 3:

mode=mode_function(array,n);
cout<<"\n\tMode = "<<mode;
break;

case 4:

break;

default:

cout<<"salah kode";
break;

}
}while(choice!=4);

}
}

float mean_function(float array[],int n)
{
int i;
float sum=0;
for(i=0;i<n;i++)

sum=sum+array[i];

return (sum/n);

}


float median_function(float a[],int n)
{

float temp;
int i,j;
for(i=0;i<n;i++)

for(j=i+1;j<n;j++)
{

if(a[i]>a[j])
{

temp=a[j];
a[j]=a[i];
a[i]=temp;

}

}

if(n%2==0)
return (a[n/2]+a[n/2-1])/2;
else
return a[n/2];

}

float mode_function(float a[],int n)
{

return (3*median_function(a,n)-2*mean_function(a,n));

}

6. Execusi

untuk rencana silahkan kunjungi latian no :

1 :ela dwi anggraini

3 :agus prasetyo