C语言算法X的n次方(递归)_c语言算法x的n次方

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#include double f(double x,int n);main(){ double x;int n;printf(“please input x & n:”);scanf(“%lf,%d”,&x,&n);if(x==0){

if(n>0)

printf(“nn0.000000nn”);

else

printf(“nnerror!nn”);} else {

if(x>0)

{

if(n==0)

printf(“nn1.000000nn”);

else

{

if(n>0)

printf(“nn%0.6lfnn”,f(x,n));

else

printf(“nn%0.6lfnn”,1/f(x,-n));

}

}

else

{

if(n==0)

printf(“nn1.000000nn”);

else

{

if(n>0)

printf(“nn%0.6lfnn”,f(x,n));

else

printf(“nn%0.6lfnn”,1/f(x,-n));

}

} } } double f(double x,int n){ if(n==1)return x;return f(x,n-1)*x;}