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Direct Method of Mean (C++ Program)

 Q). Write the C++ Program for direct method of Mean


=> Prog :


#include<iostream>

#include <iomanip>

using namespace std;


int main(){


int n;

double sumF=0,sumFX=0;


cout<<"Enter the number input  : ";

cin>>n;


double number[n];

double freq[n];


for(int i=0; i<n; i++){


    cout<<"Number["<<i+1<<"] : ";

    cin>>number[i];


    cout<<"frequency["<<i+1<<"] : ";

    cin>>freq[i];


}


cout<<"\n\n"<<setw(20)<<"Number"<<setw(10)<<"|"<<setw(20)<<"Frequency"<<endl<<endl;


for(int i=0; i<n; i++){


    cout<<setw(20)<<number[i]<<setw(10)<<"|"<<setw(20)<<freq[i]<<endl;;

    sumF=sumF+freq[i];


}


cout<<"\n****************      After Calculation      ********************\n";


cout<<"\n\n"<<setw(20)<<"Number(x)"<<setw(10)<<"|"<<setw(20)<<"Frequency(f)"<<setw(10)<<"|"<<setw(30)<<"fx"<<endl<<endl;


for(int i=0; i<n; i++){


    cout<<setw(20)<<number[i]<<setw(10)<<"|"<<setw(20)<<freq[i]<<setw(10)<<"|"<<setw(30)<<number[i]<<" x "<<freq[i]<<" = "<<number[i]*freq[i]<<endl;

    sumFX=sumFX+number[i]*freq[i];

}


cout<<endl;

 cout<<setw(30)<<"|"<<setw(20)<<"Summation F = "<<sumF<<setw(7)<<"|"<<setw(30)<<"fx = "<<sumFX<<endl;


 double mean= sumFX/sumF;


 cout<<"\n\n    =>    MEAN : "<<mean<<endl;


}



=> Output :




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