运行结果空白是为什么？

Question

#include
using namespace std;
int main()
{int year=1988,p=50;
float r=0.011;
do
{p=p*(1+r);
year++;
}while (p<=100);
cout<<"year="<<year<<endl;<br />return 0;<br />}<br /></p><p class="md_img_container">

Answer 1

p改成float类型才行
float r=0.011,p=50;