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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;}
