c++double类型

#include "iostream"
#include "stdio.h"

using namespace std;
int main(){
    //float 7位有效位数字;double 16-16位有效数字;long double 不低于double
    float aa=12313.1231232324123256;
    double  bb=1234589.4567812323123239;
    long double cc=181232423490.121123233213421323345;
    printf("aa=%lf\n",aa);
    printf("bb=%lf\n",bb);
    printf("cc=%Lf\n",cc);
}

aa=12313.123047
bb=1234589.456781
cc=181232423490.121124