【MT4学习】MQL4语言基础语法--数学运算函数
数学运算函数double MathAbs( double value)
返回数字的绝对值
:: 输入参数
value - 要处理的数字示例:
doubledx=-3.141593, dy;
// calc MathAbs
dy=MathAbs(dx);
Print("The absolute value of ",dx," is ",dy);
// Output: The absolute value of -3.141593 is 3.141593
double MathArccos(double x)
计算反余弦值 :: 输入参数
value - 要处理的数字，范围-1到1 示例:
doublex=0.32696, y;
y=asin(x);
Print("Arcsine of ",x," = ",y);
y=acos(x);
Print("Arccosine of ",x," = ",y);
//Output: Arcsine of 0.326960=0.333085
//Output: Arccosine of 0.326960=1.237711
double MathArcsin(double x)
计算反正弦值 :: 输入参数
x - 要处理的值示例:
doublex=0.32696, y;
y=MathArcsin(x);
Print("Arcsine of ",x," = ",y);
y=acos(x);
Print("Arccosine of ",x," = ",y);
//Output: Arcsine of 0.326960=0.333085
//Output: Arccosine of 0.326960=1.237711
double MathArctan(double x)
计算反正切值 :: 输入参数
x - 要处理的值示例:
doublex=-862.42, y;
y=MathArctan(x);
Print("Arctangent of ",x," is ",y);
//Output: Arctangent of -862.42 is -1.5696
double MathCeil( doublex)
返回向前进位后的值 :: 输入参数
x - 要处理的值示例:
doubley;
y=MathCeil(2.8);
Print("The ceil of 2.8 is ",y);
y=MathCeil(-2.8);
Print("The ceil of -2.8 is ",y);
/*Output:
The ceil of 2.8 is 3
The ceil of -2.8 is -2*/
double MathCos( doublevalue)
计算余弦值 :: 输入参数
value - 要处理的值示例:
doublepi=3.1415926535;
double x, y;
x=pi/2;
y=MathSin(x);
Print("MathSin(",x,") = ",y);
y=MathCos(x);
Print("MathCos(",x,") = ",y);
//Output: MathSin(1.5708)=1
// MathCos(1.5708)=0
double MathExp( doubled)
Returns value the number e raised to the power d. On overflow, the functionreturns INF (infinite) and on underflow, MathExp returns 0. :: 输入参数
d - A number specifying a power. 示例:
doublex=2.302585093,y;
y=MathExp(x);
Print("MathExp(",x,") = ",y);
//Output: MathExp(2.3026)=10
double MathFloor( doublex)
返回向后进位后的值 :: 输入参数
x - 要处理的值示例:
doubley;
y=MathFloor(2.8);
Print("The floor of 2.8 is ",y);
y=MathFloor(-2.8);
Print("The floor of -2.8 is ",y);
/*Output:
The floor of 2.8 is 2
The floor of -2.8 is -3*/
double MathLog( doublex)
计算对数 :: 输入参数
x - 要处理的值示例:
doublex=9000.0,y;
y=MathLog(x);
Print("MathLog(",x,") = ", y);
//Output: MathLog(9000)=9.10498
double MathMax( doublevalue1, double value2)
计算两个值中的最大值 :: 输入参数
value1 - 第一个值
value2 - 第二个值 示例:
doubleresult=MathMax(1.08,Bid);
double MathMin( doublevalue1, double value2)
计算两个值中的最小值 :: 输入参数
value1 - 第一个值
value2 - 第二个值 示例:
doubleresult=MathMin(1.08,Ask);
double MathMod( doublevalue, double value2)
计算两个值相除的余数 :: 输入参数
value - 被除数
value2 - 除数 示例:
doublex=-10.0,y=3.0,z;
z=MathMod(x,y);
Print("The remainder of ",x," / ",y," is ",z);
//Output: The remainder of -10 / 3 is -1
double MathPow( doublebase, double exponent)
计算指数 :: 输入参数
base - 基数
exponent - 指数 示例:
doublex=2.0,y=3.0,z;
z=MathPow(x,y);
Printf(x," to the power of ",y," is ", z);
//Output: 2 to the power of 3 is 8
int MathRand( )
取随机数
示例:MathSrand(LocalTime());
// Display 10 numbers.
for(int i=0;i<10;i++ )
Print("random value ", MathRand());
double MathRound( doublevalue)
取四舍五入的值 :: 输入参数
value - 要处理的值示例:
doubley=MathRound(2.8);
Print("The round of 2.8 is ",y);
y=MathRound(2.4);
Print("The round of -2.4 is ",y);
//Output: The round of 2.8 is 3
// The round of -2.4 is -2
double MathSin( doublevalue)
计算正弦数 :: 输入参数
value - 要处理的值示例:
doublepi=3.1415926535;
double x, y;
x=pi/2;
y=MathSin(x);
Print("MathSin(",x,") = ",y);
y=MathCos(x);
Print("MathCos(",x,") = ",y);
//Output: MathSin(1.5708)=1
// MathCos(1.5708)=0
double MathSqrt( doublex)
计算平方根 :: 输入参数
x - 要处理的值示例:
doublequestion=45.35, answer;
answer=MathSqrt(question);
if(question<0)
Print("Error: MathSqrt returns ",answer," answer");
else
Print("The square root of ",question," is ", answer);
//Output: The square root of 45.35 is 6.73
void MathSrand( intseed)
通过Seed产生随机数 :: 输入参数
seed - 随机数的种子示例:
MathSrand(LocalTime());
// Display 10 numbers.
for(int i=0;i<10;i++ )
Print("random value ", MathRand());
double MathTan( doublex)
计算正切值 :: 输入参数
x - 要计算的角度示例:
doublepi=3.1415926535;
double x,y;
x=MathTan(pi/4);
Print("MathTan(",pi/4," = ",x);
//Output: MathTan(0.7856)=1
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