, // 1
// 1.cpp //
#include "stdafx.h"
#include <conio.h>
#include <math.h>
int _tmain(int argc, _TCHAR* argv[])
{
float
x=0.1 //
,y=0 //
,y2,y3 //
,x1,x2 //
,a=3,b=-5,c=1 //
,p1=3,p2=4,p3=5//
,pp //
,s; //
// 1. y=f1(x)
y=sin(x);
printf("1.\tx=%f\ty=%f\n\n",x,y);
// 2.1 y=f2(x)
printf("2.1\tx=%f\ty=%f\n\n",x,y);
// 2.2 y=f2(x)
printf("2.2\tx=%f\ty=%f\n\n",x,y);
// 2.3 y=f2(x) y2 y3
printf("2.3\tx=%f\ty2=%f\ty3=%f\ty=%f\n\n",x,y2,y3,y);
// 3.1 x1 x2
printf("3.1\tx1=%f\tx2=%f\n\n",x1,x2);
// 3.2 printf
// 4.
printf("4.\tp1=%f\tp2=%f\tp3=%f\ts=%f\n\n",p1,p2,p3,s);
//*/
getch();
return 0;
}// 1
/* 2.1 getch(); . . .
Ĩ
1. 1.
- y=sin(x); e-x/5, exp.
- OpenOffice Calc e-x/5sin x ( , , ), . x .
2. 2.1
- /* 2.2.
- 2.1 , y=3x4-4x3+2x2-7x+1, xn pow(x,n),
- x , x .
3. 2.2
- /* 2.3.
- 2.2 , y=3x4-4x3+2x2-7x+1, x .
- , 2.1 2.2.
|
|
4. 2.3
- /* 3.1.
- 2.3 , y=3x4-4x3+2x2-7x+1 y2 y3, .
- , 2.1 2.3.
5. 3.1
- /* 3.2.
- 3.1 , x1 x2 ax2+bx+c=0.
- a, b c , a, b c .
6. 3.2
- /* 4.
- 4. printf, . .
. 4
- /* */.
- 4. , p1, p2 p3 pp s .
- p1, p2 p3 , p1, p2 p3 .
:
-
-
- ,
-
< ><>< >, , 25.736, < ( )> < E e>< ( )>, <>, 10 <>, , 25.736 25736e-3, 25.736e0,
0.25736e2. .....
- double.
- ( , ) , , (float)2.4
- () .
- ; π Excel - (), C++ M_PI, #include "math.h"
#define _USE_MATH_DEFINES M_PI