#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;
bool isint(double num);
int main(){
double a=log(536870912)/log(2);
printf("%f\n",a);
cout<<isint(a)<<'\t'<<isint(29.00);
return 0;
}
bool isint(double num){
int tnum=int(num);
cout<<tnum<<'\t'<<num<<endl;
if(num-tnum) return false;
return true;
}
明明log(536870912)/log(2)和29值一样,为什么最后调用isint()的结果不同