//生成表达式
public GenerateExp(
bool hasNegative/*负数*/,
bool hasMultDiv/*乘除法*/,
bool hasBrack/*括号*/,
bool hasFrac/*分数*/,
int opCount/*运算符个数上限*/,
int exerciseCount/*数量上限*/,
int leftRange/*左值域*/,
int rightRange/*右值域*/,
string ExePath,
string AnsPath,
ref int FactCount/*实际产生值*/
)
{
//只需要一个随机种子就够了
int iRnd = DateTime.Now.Millisecond;
Random rand = new Random(iRnd);
//需要一个用来判重的HashSet
HashSet<string> MinusHash = new HashSet<string>();
//按照操作符上限生成
StringBuilder buildExercise = new StringBuilder();
StringBuilder buildAnswer = new StringBuilder();
DateTime time1=DateTime.Now, time2;
int i = 0;
try {
for (i = 0; i < exerciseCount;)
{
try {
//在1和OpCount之间生成一个操作符的数量,注意这里的opCount是需要带上+1的！！
int OpCount = rand.Next(1, opCount + 1);
string[] operation = GenerateOperation(rand, OpCount, hasMultDiv);
//因为操作数总比操作符多1个，所以FracCount=OpCount+1
int FracCount = OpCount + 1;
Fraction[] Numbers = GenerateNumber(rand, FracCount, hasNegative/*控制生成的数里是否有负数*/, hasFrac/*生成的数里是否有分数*/, leftRange, rightRange);
//生成一个表达式啦!
ExpTree Expression = new ExpTree(Numbers, operation, hasNegative, hasBrack, hasFrac, leftRange, rand);
/*，如果最后出现了超过范围的数，会被转换成负数，那该怎么办呢... [FIXME]*/
//如果发现之前已经有重复的式子了，那就重新生成一个
if (MinusHash.Contains(Expression.TreeMinusLamda))
{
time2 = DateTime.Now;
TimeSpan Ts = time2 - time1;
if (Ts.Seconds >= 20)
throw new MyException.OwnException("这式子要爆炸！");
continue;
}
i++;
MinusHash.Add(Expression.TreeMinusLamda);
buildExercise.Append(i + "." + Expression.TreeInfix + Environment.NewLine);
buildAnswer.Append(i + "." + Expression.Answer + Environment.NewLine);
time1 = DateTime.Now;
}
//如果遭遇了溢出错误，则继续生成...
catch (System.OverflowException)
{
time2 = DateTime.Now;
TimeSpan Ts = time2 - time1;
if (Ts.Seconds >= 20)
throw new MyException.OwnException("这式子要爆炸！");
continue;
}
}
}
catch(MyException.OwnException)
{
throw new MyException.TooManyException("抱歉，我实在产生不了这么多式子，放过我吧...");
}
finally
{
FactCount = i;
ExeToFile(buildExercise,ExePath);
AnsToFile(buildAnswer,AnsPath);
}
}
//生成表达式
public GenerateExp(
bool hasNegative /*负数*/,
bool hasMultDiv /*乘除法*/,
bool hasBrack /*括号*/,
bool hasFrac /*分数*/,
int opCount /*运算符个数上限*/,
int exerciseCount /*数量上限*/,
int leftRange /*左值域*/,
int rightRange /*右值域*/,
string ExePath,
string AnsPath,
ref int FactCount/*实际产生值*/
)
{
//只需要一个随机种子就够了
int iRnd = DateTime.Now.Millisecond;
Random rand = new Random(iRnd);
//需要一个用来判重的HashSet
HashSet <string> MinusHash = new HashSet <string>();
//按照操作符上限生成
StringBuilder buildExercise = new StringBuilder();
StringBuilder buildAnswer = new StringBuilder();
DateTime time1 = DateTime.Now, time2;
int i = 0;
try {
for (i = 0; i < exerciseCount;)
{
try {
//在1和OpCount之间生成一个操作符的数量,注意这里的opCount是需要带上+1的！！
int OpCount = rand.Next(1, opCount + 1);
string[] operation = GenerateOperation(rand, OpCount, hasMultDiv);
//因为操作数总比操作符多1个，所以FracCount=OpCount+1
int FracCount = OpCount + 1;
Fraction[] Numbers = GenerateNumber(rand, FracCount, hasNegative /*控制生成的数里是否有负数*/, hasFrac /*生成的数里是否有分数*/, leftRange, rightRange);
//生成一个表达式啦!
ExpTree Expression = new ExpTree(Numbers, operation, hasNegative, hasBrack, hasFrac, leftRange, rand);
/*，如果最后出现了超过范围的数，会被转换成负数，那该怎么办呢... [FIXME]*/
//如果发现之前已经有重复的式子了，那就重新生成一个
if (MinusHash.Contains(Expression.TreeMinusLamda))
{
time2 = DateTime.Now;
TimeSpan Ts = time2 - time1;
if (Ts.Seconds >= 20)
{
throw new MyException.OwnException("这式子要爆炸！");
}
continue;
}
i++;
MinusHash.Add(Expression.TreeMinusLamda);
buildExercise.Append(i + "." + Expression.TreeInfix + Environment.NewLine);
buildAnswer.Append(i + "." + Expression.Answer + Environment.NewLine);
time1 = DateTime.Now;
}
//如果遭遇了溢出错误，则继续生成...
catch (System.OverflowException)
{
time2 = DateTime.Now;
TimeSpan Ts = time2 - time1;
if (Ts.Seconds >= 20)
{
throw new MyException.OwnException("这式子要爆炸！");
}
continue;
}
}
}
catch (MyException.OwnException)
{
throw new MyException.TooManyException("抱歉，我实在产生不了这么多式子，放过我吧...");
}
finally
{
FactCount = i;
ExeToFile(buildExercise, ExePath);
AnsToFile(buildAnswer, AnsPath);
}
}
