# include <stdio.h>
# include <math.h>
main()
{
    float i,j,k;

    for(i=1;i<100;i++)
    {
        k=sqrt(i);
        for(j=2;j<k;j++)
        if(k%i==0)
        {
            break ;
        }

        
    }

}

    2    IntelliSense: 表达式必须具有整数或未区分范围的枚举类型

哦哦，谢谢