C language POW function (how to play exponential function in C language)

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C In language POW Function USES ：

#include

#defineACCURACY100

doublefunc1(doublet,intn);

doublefunc2(doubleb,intn);

doublepow2(doublea,doubleb);

intmain(){

printf(“%lf”,pow2(5.21,4.11));

return0;

}

doublepow2(doublea,doubleb){

if(a==0&&b>0){

return0;

}

elseif(a==0&&b<=0){

return1/0;

}

elseif(a<0&&!(b-(int)b<0.0001||(b-(int)b>0.999))){

return1/0;

}

if(a<=2&&a>=0){

doublet=a-1;

doubleanswer=1;

for(inti=1;i

answer=answer+func1(t,i)*func2(b,i);

}

returnanswer;

}

elseif(a>2){

inttime=0;

while(a>2){

a=a/2;

time++;

}

returnpow2(a,b)*pow2(2,b*time);

}

else{

if((int)b%2==0){

returnpow2(-a,b);

}

else{

return-pow2(-a,b);

}

}

}

doublefunc1(doublet,intn){

doubleanswer=1;

for(inti=0;i

answer=answer*t;

}

returnanswer;

}

doublefunc2(doubleb,intn){

doubleanswer=1;

for(inti=1;i<=n;i++){

answer=answer*(b-i+1)/i;

}

returnanswer;

}

Extended data

C++ Provide the following pow Overloaded form of function ：

doublepow(doubleX,intY);

floatpow(floatX,floatY);

floatpow(floatX,intY);

longdoublepow(longdoubleX,longdoubleY);

longdoublepow(longdoubleX,intY);

The parameter type should be set reasonably when using 636f707962616964757a686964616f31333431373861, Avoid multiple “pow” The instance matches the parameter list .

Among them, the use of shapes such as :

intX,Y;

intnum=pow(X,Y);

This is a commonly used function , But the compiler will remind you that there are multiple “pow” The instance matches the parameter list .

You can use cast to solve this problem ：num=pow((float)X,Y);

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