我在为这个具有性别作为循环控制变量的代码编写while循环时遇到问题（当您输入性别时，它在具有特定条件的do-while循环中才有效）。此外，我不知道如何计算接受候选人的人数和百分比。
char gender; //INPUT Gender of candidate
char genderOk; //CALC & OUT Checks validity of gender input
int height; //INPUT Height of candidate
int heightOk; //CALC & OUT Valid height range for candidate
int weight; //INPUT Weight of candidate
int weightOk; //CALC & OUT Valid weight range for candidates
int count; //INPUT Counter of the FOR loop
int candidates; //INPUT Amount of candidates per test
int acceptCand; //CALC & OUT # of candidates accepted per test
int acceptPerc; //CALC & OUT % of candidates accepted per test
// INPUT - describe input here
cout << left;
for(count = 1; count <= 3; count++)
{
cout << "TEST RUN #" << count << endl << endl << endl;
cout << "Please enter candidate's information (enter 'X' to "
"exit).\n";
gender = 'f';
while(gender != 'X' || gender != 'x')
{
do
{
cout << "Gender: ";
cin.get(gender);
cin.ignore(1000, '\n');
genderOk = gender != 'm' && gender != 'M' && gender != 'f'
&& gender != 'F';
if(genderOk)
{
cout << "***** Invalid gender; please enter M or F "
"*****";
cout << endl;
}
}while(genderOk);
do
{
cout << "Height: ";
cin >> (height);
cin.ignore(1000, '\n');
heightOk = height >= 24 && height <= 110;
if(!heightOk)
{
cout << "***** Invalid height; please enter a height "
"in inches between 24 and 110. *****";
cout << endl;
}
}while(!heightOk);
do
{
cout << "Weight: ";
cin >> weight;
cin.ignore(1000, '\n');
weightOk = weight >= 50 && weight <= 1400;
if(!weightOk)
{
cout << "***** Invalid weight; please enter a weight "
"in lbs between 50 and 1400. *****";
cout << endl;
}
}while(!weightOk);
if(gender == 'm' || gender == 'M')
{
heightOk = height >= 65 && height <= 80;
weightOk = weight >= 130 && weight <= 250;
if(heightOk && weightOk)
{
cout << RESULT << "ACCEPTED!\n\n\n\n";
}
else
{
if(!heightOk)
{
if(!weightOk)
{
cout << RESULT << "rejected based on the "
"HEIGHT and WEIGHT "
"requirements."
"\n\n\n\n";
}
else
{
cout << RESULT << "rejected based on the "
"HEIGHT requirement."
"\n\n\n\n";
}
}
else
{
if(!weightOk)
{
cout << RESULT << "rejected based on the "
"WEIGHT requirement."
"\n\n\n\n";
}
}
}
}
if(gender == 'f' || gender == 'F')
{
heightOk = height >= 62 && height <=75;
weightOk = weight >= 110 && weight <= 185;
if(heightOk && weightOk)
{
cout << RESULT << "ACCEPTED!\n\n\n\n";
}
else
{
if(!heightOk)
{
if(!weightOk)
{
cout << RESULT << "rejected based on the "
"HEIGHT and WEIGHT "
"requirements.\n\n\n\n";
}
else
{
cout << RESULT << "rejected based on the"
" HEIGHT requirement."
"\n\n\n\n";
}
}
else
{
if(!weightOk)
{
cout << RESULT << "rejected based on the "
"WEIGHT requirement."
"\n\n\n\n";
}
}
}
}
}
}
答案 0 :(得分：0)
要解决你的while循环条件问题，而不是检查主循环中的输入性别是什么（实际上从未验证过，因为性别是在while循环中分配的），你的while循环的控制条件可以是布尔变量。
：此：
bool isQuit = false;
while(!isQuit)
{
...
代替：
gender = 'f';
while(gender != 'X' || gender != 'x')
{
...
然后，当用户可以输入性别时，您将检查是否已退出。 （在这种情况下，gender == 'X' || gender == 'x'。）
if(gender == 'X' || gender == 'x') {
isQuit = true;
break;
} else if(genderOk) {
cout << "***** Invalid gender; please enter M or F "
"*****";
cout << endl;
}
...
这将突破用于输入性别的do..while循环。所有需要添加的都是检查用户是否选择退出输入循环。
// After the do..while loop for inputting gender
if(isQuit) {
break;
}
现在程序将突破我们定义为具有while(!isQuit)循环条件的主while循环。
注意：以上内容不会突破运行三次“测试运行”的for循环。要使用isQuit变量退出整个程序，请在for循环的末尾添加以下代码：
if(isQuit) {
break;
}
} // END OF YOUR FOR LOOP
要计算候选人数，接受候选人数和接受候选人的百分比，我们需要跟踪两件事情。
candidates）acceptCand中的商店值）首先我们需要正确设置变量：
int candidates; //INPUT Amount of candidates per test
int acceptCand; //CALC & OUT # of candidates accepted per test
float acceptPerc; //CALC & OUT % of candidates accepted per test
candidates = 0;
acceptCand = 0;
acceptPerc = 0;
每当我们达到用户未输入值的点时，我们假设他们已输入有效候选人。如果您检查候选人的性别，我们可以将候选人计数器增加1。
if(gender == 'm' || gender == 'M') {
candidates++;
...
if(gender == 'f' || gender == 'F') {
candidates++;
...
现在我们正在跟踪候选人总数，现在我们需要知道接受候选人的人数。为此，我们在每次接受候选人时将acceptCand变量增加一。
if(heightOk && weightOk) {
cout << "ACCEPTED!\n\n\n\n";
acceptCand++;
}
最后，要获得已接受候选人的百分比，您将执行以下操作：
acceptPerc = (acceptCand / (float)candidates) * 100;
注意： acceptPerc是float数据类型，因此我们可以使用小数位。我们将candidates变量输入到float，以便我们避免整数除法，这会导致我们丢失小数位并仅返回整数。