C/C++: Variance, Standard Deviation and Coefficient of Variation

Output:

 

C Codes:

	#include <stdio.h>
	#include <math.h>
	int main()
	{
	int i, n;
	float mean, sd, var, dev, sum = 0.0,
	sdev = 0.0, cv;
	printf("Enter the Sample Size: ");
	scanf("%d", &n);
	float x[n];
	printf("Enter the Data: ");
	for(i = 1; i <= n; ++i){
	scanf("%f", &x[i]);
	sum = sum + x[i];
	}
	mean = sum / n;
	for(i = 1; i <= n; ++i){
	dev = (x[i] - mean)*(x[i] - mean);
	sdev = sdev + dev;
	}
	var = sdev / (n - 1);
	sd = sqrt(var);
	cv = (sd / mean) * 100;
	printf("Variance: %6.3f\n", var);
	printf("Standard Deviation: %6.3f\n", sd);
	printf("Coefficient of Variation: %6.3f\%\n", cv);
	return 0;
	}

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C++ Codes:

	#include <iostream>
	#include <iomanip>
	#include <math.h>
	using namespace std;
	int main()
	{
	int i, n;
	float mean, sd, var, dev, sum = 0.0,
	sdev = 0.0, cv;
	cout << "Enter the Sample Size: ";
	cin >> n;
	float x[n];
	cout << "Enter the Data: ";
	for (i = 1; i <= n; ++i){
	cin >> x[i];
	sum = sum + x[i];
	}
	mean = sum / n;
	for(i = 1; i <= n; ++i){
	dev = (x[i] - mean)*(x[i] - mean);
	sdev = sdev + dev;
	}
	var = sdev / (n - 1);
	sd = sqrt(var);
	cv = (sd / mean) * 100;
	cout << "Variance: ";
	cout << setprecision(5) << var << endl;
	cout << "Standard Deviation: ";
	cout << setprecision(5) << sd << endl;
	cout << "Coefficient of Variation: ";
	cout << setprecision(5) << cv << "\%" << endl;
	return 0;
	}

view raw varsd.cpp hosted with ❤ by GitHub