学习long double类型用法

#include <stdio.h>
#include <math.h>

 

long double GetLog(long double x,long double y)
{
    return log(y)/log(x);
}

 

int main()
{
   long double a,b;
    printf("this programme is to computer log(a)b:/n");
    printf("please input a:/n");
    scanf("%lf",&a);
     printf("please input b:/n");
     scanf("%lf",&b);
    printf("log(%lf)%lf=%f/n",a,b,GetLog(a,b));
     getch();
    return 0;
}