#include<stdio.h>
#include<math.h>
main()
{int a=1,b=4,c=2;
float x=10.5,y=4.0,z;
z=(a+b)/c+sqrt((double)y)*1.2/c+x;
pritnf("%f\n",z);}
A.14.000000 B.015.400000
C.13.700000 D.14.900000
#include<stdio.h>
#include<math.h>
main()
{int a=1,b=4,c=2;
float x=10.5,y=4.0,z;
z=(a+b)/c+sqrt((double)y)*1.2/c+x;
pritnf("%f\n",z);}
A.14.000000 B.015.400000
C.13.700000 D.14.900000
include%<math.h>
include<stdio.h>
main()
{float x,y;
scanf("%f".______);/*第一空*/
if(x<0)printf("input error!\n");
else
{switch((int)(x/2))
{case 0:y—x;______;/*第二空*/
case 1:
case 2:y=x*x+1;break;
case 3:
case 4:y=______;break;/*第三空*/
default:y=1/(x*x+1);
}
printf("x=%7.2f,y=%10.6f\n",x,y);
}
}
y1=(x+8)2(上标)-2(x+8)+6
y2=sin2(上标)(x)-2sin(x)+6
请填空。
include "math.h"
double fun(double x){ return (x*x-2*x+6);}
main()
{ double x,y1,y2;
printf("Enter x:"); scanf("%1f",&x);
y1=fim([ ]);
y2=run([ ]);
printf("y1=%1f,y2=%1f\n",y1,y2);
}
y1=(x+8) 2-2 (x+8)+6
y2=sin 2(x)-2sin(x)+6
请填空。
#include "math.h"
double fun(double x){ return (x*x-2*x+6); }
main()
{ double x,y1,y2;
printf("Enter x:"); scanf("%lf",&x);
y1=fun(【 11 】 );
y2=fun(【 12 】 );
printf("y1=%lf,y2=%lf\n",y1,y2);
}
【说明】
①在类体中添加函数move(double ax,double ay)的定义,使得点的坐标x和y分别移动 ax和ay个单位。
②在类定义外完成重载的两个构造函数CPosition()和CPosition(double dx,double dy),其中前者为不带参数的构造函数,使CPosition对象的默认值为x=0,y=0,后者为带参数的构造函数,把数据成员x和y分别初始化为参数dx和dy的值。
③完成函数double distance(double bx,double by)的定义,该函数返回*this和点(bx, by)的距离。
注意:除在指定的位置添加语句外,请不要改动程序中的其他语句。
源程序文件test5.cpp清单如下:
include<iostream.h>
include<math.h>
class CPosition
{
public:
CPosition();
CPosition(double dx,double dy);
double getx();
double gety();
(1)
double distance(double bx,double by);
private:
double x;
double y;
};
(2)
{
x=0;y=0;
}
CPosition::CPosition(doub,e dx,doub,e dy)
{
x=dx; y=dy;
}
double CPosition::getx()
{
return x;
}
double CPosition::gety()
{
return y;
}
double CPosition::distance(double bx,double by)
{
(3)
}
vold main()
{
double a,b;
cout<<"|nput x,y position of a point:";
cin >> a >> b;
CPosition psA(a,b);
cout<<"Input x,y position of another point:";
cin >>a >> b;
cout <<"The distance is" <<psA.distance(a,b) <<end1;
}
A、10
B、100
C、1000
D、11
A、Compared to x(t), y(t) is advanced
B、Compared to x(t), y(t) is delayed
C、Compared to x(t), y(t) is stretched
D、Compared to x(t), y(t) is compress
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