C语言double类型与int类型的转化；

#include<stdio.h>
#include<stdlib.h>
main()
{
	int a = 3;
	double b;
	int c;
	double d = 3.14;
	b = (double)a;		//将int型的数值a转化为double类型的b
	c = (int)d;		   		//将double类型的数值d转化为int型的c
	printf("a的值是%d\n",a);
	printf("b的值是%lf\n",b);
	printf("d的值是%lf\n",d);
	printf("c的值是%d\n",c);
	system("pause");
}