浮点数精度错误

代码如下：

#include<iostream>

using namespace std;


int main()
{     
	float a=0.05;
	float b=0.01;
	float c=1.0;
	float d=0.42;
    float e=4.015;
	float f=100;
	float g=123.3;
    
    cout<<(a+b)<<endl;
    cout<<(c - d)<<endl;
    cout<<(e * f)<<endl;
    cout<<(g / f)<<endl;
	
    printf("%f\n",(a+b));
    printf("%f\n",(c - d));
    printf("%f\n",(e * f));
    printf("%f\n",(g / f));
	system("pause");
	return 1;
}

输出结果如下：