问题描述
我在寻找百分比时遇到问题.当显示数学问题的输出时，我需要:#完成，正确，错误和正确百分比.除了百分比以外，其他所有内容都正确无误.如果所有问题都正确，则表明100％的其他值均为0％.我在做什么错了.
cout<< setw(17)<< 添加:"<< setw(16)<< TotalAddProb<< setw(17)<< AddCountRight<< setw(11)<< AddCountWrong<< setw(11)<< setprecision(2)<<固定<< (((AddCountRight)/(TotalAddProb)* 100)<< "\ n";
I am having a problem with finding percentage. When displaying output from math problems i need: # complete, Right, Wrong, and percentage right. All but percentage comes out correct. If all problems are correct it shows 100% anything else is 0%. What am I doing wrong.
cout << setw(17) << "Addition: " << setw(16) << TotalAddProb << setw(17) << AddCountRight << setw(11) << AddCountWrong << setw(11) << setprecision(2) << fixed << ((AddCountRight) / (TotalAddProb) *100) << "\n";
推荐答案
((AddCountRight) / (TotalAddProb) *100)
为此:
To this:
(AddCountRight * 100.0 / TotalAddProb)
在您的版本中，您正在执行整数除法，因此结果将被截断为0，然后再乘以100(结果为0).在我的版本中，我将整数转换为浮点数，然后执行其余的数学运算(这避免了整数除法).
In your version, you are performing integer division, so the result gets truncated to 0 then multiplied by 100 (the result of which is 0). In my version, I convert the integer to a floating point number, then perform the rest of the math (which avoids the integer division).
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