Question

c语言程序设计 求2的N次方

Answer 1

#include<stdio.h>
unsigned long pow(unsigned long n){//递归求二的N次方
unsigned long res=0;
if(n==0) res=1;
else res=2*pow(n-1);
return res;
}
void main(){
unsigned long n,sum=0;
scanf("%ld",&n);
sum=pow(n);
printf("二的%ld次方等于：%ld",n,sum);
}