Mean and Variance Calculator

Calc-for-Average

用于计算多个数字总和，平均值，方差的MFC程序

使用方法

把数据输入到框里，允许小数输入，使用空格分开

源码及下载

项目Github地址。
核心代码如下

UpdateData(TRUE);
string stringdata = CT2A(m_input.GetBuffer());
char* strdata=(char*)stringdata.c_str();
char* token, * next_token = NULL;
char seps[] = " ";
long double sum=0,e=0,s=0;
vector<long double> data;

token = strtok_s(strdata, seps, &next_token);

while (token != NULL) {
	if (token != NULL)
	{
		data.push_back(stold(token));
		token = strtok_s(NULL, seps, &next_token);
	}
}

for (size_t i = 0; i <= data.size(); i++) //求和
	sum += data[i];
    e = sum / data.size(); //求平均值

for (size_t i = 0; i <= data.size(); i++) { //求方差
	if (i != data.size() - 1)
	s += (data[i] - e) * (data[i] - e);
}
s = s / data.size();

string sum_ret = to_string(sum);
string e_ret = to_string(e);
string s_ret = to_string(s);

m_sum = sum_ret.c_str();
m_avg = e_ret.c_str();
m_var = s_ret.c_str();

UpdateData(FALSE);

Calc-for-Average

An MFC program used to calculate the sum, mean, and variance of multiple numbers.

Usage

Input the data into the box, decimal input is allowed, separated by spaces.

Source Code and Download

Project Github Address.
The core code is as follows

UpdateData(TRUE);
string stringdata = CT2A(m_input.GetBuffer());
char* strdata=(char*)stringdata.c_str();
char* token, * next_token = NULL;
char seps[] = " ";
long double sum=0,e=0,s=0;
vector<long double> data;

token = strtok_s(strdata, seps, &next_token);

while (token != NULL) {
	if (token != NULL)
	{
		data.push_back(stold(token));
		token = strtok_s(NULL, seps, &next_token);
	}
}

for (size_t i = 0; i <= data.size(); i++) //求和
	sum += data[i];
    e = sum / data.size(); //求平均值

for (size_t i = 0; i <= data.size(); i++) { //求方差
	if (i != data.size() - 1)
	s += (data[i] - e) * (data[i] - e);
}
s = s / data.size();

string sum_ret = to_string(sum);
string e_ret = to_string(e);
string s_ret = to_string(s);

m_sum = sum_ret.c_str();
m_avg = e_ret.c_str();
m_var = s_ret.c_str();

UpdateData(FALSE);