因此,以下代码可以正常工作,但有一个例外:
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
int value1, value2, value3, value4;
float calcMean,calcStDev;
// Input values from keyboard
// prompt user for input
cout << "Enter 1st value. " << endl;
cin >> value1;
cout << "Enter 2nd value. " << endl;
cin >> value2;
cout << "Enter 3rd value. " << endl;
cin >> value3;
cout << "Enter 4th value. " << endl;
cin >> value4;
// Calculate the mean, mean = (value1 + value2 + value3 + value4)/4.0
calcMean = (value1 + value2 + value3 + value4) / 4.0;
// Calculate the standard deviation, standard deviation = squareroot((sum((input value-mean)*(input value-mean)))/number of input value - 1)
calcStDev = sqrt((pow((value1 - calcMean),2) + pow((value2 - calcMean),2) + pow((value3 - calcMean),2) + pow((value4 - calcMean),2))/(4-1));
// Output display
cout << fixed << setprecision(2) << endl;
cout << "Mean of the four values: " << setw(10) << calcMean << endl;
cout << "Standard deviation of the four values: " << setw(10) << calcStDev << endl;
cin.get();
cin.get();
return 0;
}
输出似乎没有像我期望的那样响应setw()(我希望数字18.50直接在19.64之上,一个在另一个之上)。
知道我在做什么错吗?:
Enter 1st value.
2
Enter 2nd value.
36
Enter 3rd value.
35
Enter 4th value.
1
Mean of the four values: 18.50
Standard deviation of the four values: 19.64
最佳答案
我认为问题在于字符串文字"Mean of the four values: "
包含嵌入的制表符。要插入空格,可以按TAB键而不是SPACEBAR键。
关于c++ - C++中的Setw()没有像我预期的那样响应,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/21646354/