Zscore, C++ (gcc) - rextester

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//g++  7.4.0

//write a program that computes and prints mean,standard deviation and z-scores of the input data

//this code is created by Rezaul Hoque on August 05,2021;contact: jewelmrh@yahoo.com

//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

#include <iostream>
#include <cmath>
using namespace std;
const int n=8;
float sd(float [],float);
void zscore(float [],float,float);
float sd(float a[],float mean){
int i,psd,sd;
for(i=0;i<n;i++)
psd=(a[i]-mean)*(a[i]-mean);
sd=sqrt(psd)/(n-1);
return sd;
}

void zscore(float a[],float mean,float sd){
float z[n];
for(int i=0;i<n;i++)
z[i]= (a[i]-mean)/sd;
for(int i=0;i<n;i++){
cout<<" "<<*(z+i);
cout<<"\n";
}
}

int main(){
float a[]={0.01,0.02,0.03,0.04,0.05,0.06,0.15,0.25};

float sum=0,mean;
for(int i=0;i<n;i++)
sum += a[i];
mean = sum/n;
cout<<" mean: "<<mean<<" \n";
cout<<"standard deviation: "<<sd(a,mean)<<"\n" ;
float m= sd(a,mean);
cout<<"Z-scores: \n";
zscore(a,mean,m);
return 0;
}

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Compilation time: 0.84 sec, absolute running time: 0.16 sec, cpu time: 0 sec, memory peak: 5 Mb, absolute service time: 1,1 sec