Examination_IT / Programming bases on With C++

181

@ false, Z ;. ~ F > 0, ;, ; -

x1 x2, d, , -

; x1 x2, ; :

// ‚DJ@F=>?@> <>{>FR<>??DE PQB?>K. *x1 = (-b+sqrt(D))/2.0/a;

*x2 = (-b-sqrt(D))/2.0/a;

5 =,

. s x1 x2,

, , ; x1 x2, . . = ; x1 x2. ~ - d , , , -

, ;@ @ ,

@…

x1[0] = (-b+sqrt(D))/2.0/a; x2[0] = (-b-sqrt(D))/2.0/a;

: Z , . . ;

, @ Z. /,

;.

3 = _tmain. B

= Quadratic:

MaterialRoots = Quadratic(a, b, c, &x1, &x2);

3 – Z==

a, b, c, – x1 x2. 3

, = Quadratic

x1 x2 = _tmain.

6.4.

@ ( )

n. :

182

a, -

, b. : -

n, a b

, @ ; -

. ? =:

; FormkVect –

; Determination – d .

? d ( 6.5) -

= _tmain

Vector. s Vector -

= FormkVect, ;

pVect, ;@ Vector, -

;@ . D -

. 6.6.

B = ; WriteVect, -

;

pText. !, Z =-

WriteVect = _tmain:

WriteVect("„FEQ^?DK <>PRQB:", Vector, n);

„FEQ^?DK <>PRQB:. / =- ; WriteVect Z , ….

8 58 9 6.5. !6:; Ex06_05.cpp

/////////////////////////////////////////////////////////

///

// jHAQ=?;>R CHFF@< <>{>FR<>??DC@ J@F=HC@. void FormkVect(double *pVect, int n)

{

int i;

for(i=0; i<n; i++)

pVect[i] = (rand()%1000-500)/100.0;

}

183

/////////////////////////////////////////////////////////

///

// |>wH>R IH^HJb.

void Determination(double *pVect, int n, double a, double b)

{

int i;

for(i=0; i<n; i++)

{

if(pVect[i]>0.0) pVect[i] -= a; if(pVect[i]<0.0) pVect[i] = b*i;

}

}

/////////////////////////////////////////////////////////

///

//‚D<Q^@R < QP?Q <>PRQB (Q^?QC>B?DK CHFF@<). void WriteVect(char *pText, double *pVect, int n)

{

int i;

cout << pText << endl; for(i=0; i<n; i++)

cout << setw(6) << pVect[i]; cout << endl;

}

/////////////////////////////////////////////////////////

///

//t=H<?H; ABQdBHCCH.

void main()

{

setlocale(LC_CTYPE, "Russian_Russia.1251"); double *Vector;

// „FEQ^?D> ^H??D>. double a = 4.76, b = 1.2; int n; // BHIC>B <>PRQBH

cout << "|HIC>B <>PRQBH> "; cin >> n;

//‚D^>=>?@> AHC;R@. Vector = new double[n];

//jHAQ=?>?@> CHFF@<H <>{>FR<>??DC@ J@F=HC@. FormkVect(Vector, n);

//‚D<Q^ < QP?Q @FEQ^?QdQ CHFF@<H. WriteVect("„FEQ^?DK <>PRQB:", Vector, n);

184

//|>w>?@> IH^HJ@. Determination(Vector, n, a, b);

//‚D<Q^ < QP?Q B>w>?@; IH^HJ@. WriteVect("|>w>?@>:", Vector, n); cout << endl;

//8F<Q9Qk^>?@> AHC;R@.

delete Vector;

// †^>C ?HkHR@; =m9QK P=H<@w@ P=H<@HRbBD. system("pause");

}

D. 6.6. D Ex06_05

6.5

n×m, @ . B

… Z -

( ). 5 . D d 6.6. / =

= FindMaxAndPos. 5 =,

; Matrix

MaxElem Position,

Z -

( ). ? n m ;

.

?, r pRovs,

d Z . :-

, -

… .

185

. ? -

Z i-

; pRovs:

pRovs = Matrix[i];

3 Z

, . F ;@ ;

; Z i-

MaxElem[i] Position[i] .

MaxElem[i] = pRovs[0];

Position[i] = 0;

Z pRovs, -

Z .

/, = FormkVect -

. ? Z Z = …

i- , -

; -

. F = FormkVect

;@ :

FormkVect(Matrix[i], m);

5 = :

FormkVect(&Matrix[i][0], m);

3 _tmain.

r ; -

int **Matrix, *MaxElem, *Position;

B Z . -

n m -

. ? -

186

, -

,

Z .

? =

= FindMaxAndPos. ? = MaxElem Position

@ d . / -

Z . D -

. 6.7.

8 58 9 6.6. !6:; Ex06_06.cpp

/////////////////////////////////////////////////////////

///////

// jHAQ=?;>R CHFF@< c>=DC@ F=bJHK?DC@ J@F=HC@. void FormkVect(int *pVect, int n)

{

int i;

for(i=0; i<n; i++)

pVect[i] = rand()%500-250; }// ]Q?>c ab?Pc@@ FormkVect.

/////////////////////////////////////////////////////////

///////

// ‚D<Q^@R < QP?Q <>PRQB (Q^?QC>B?DK CHFF@<). void WriteVect(char *pText, int *pVect, int n)

{

int i;

cout << pText; for(i=0; i<n; i++)

cout << setw(6) << pVect[i]; cout << endl;

}// ]Q?>c ab?Pc@@ WriteVect.

///////////////////////////////////////////////////////

187

//eHEQ^@R < PHk^QK FRBQP> ^<bEC>B?QK CHRB@cD n*m

//CHPF@CH=f?DK Œ=>C>?R, BHFAQ=Qk>??DK F=><H. void FindMaxAndPos(int **Matrix, int *MaxElem,

int *Position, int n, int m)

{

//pPHIHR>=f ^=; EBH?>?@; H^B>FQ< FRBQP ^<bEC>B?QK

//CHRB@cD.

int *pRovs;

for(int i=0; i<n; i++) // c@P= AQ FRBQPHC CHRB@cD.

{

//jHAQC@?H>C bPHIHR>=f ?H i-m FRBQPb CHPRB@cD. pRovs = Matrix[i];

//GB@?@CH>C, JRQ CHPF@CH=f?DK Œ=>C>?R

//?HEQ^@RRF; < < ?b=><QK ;J>KP> CHFF@<H pRovs. MaxElem[i] = pRovs[0];

//jHAQC@?H>C AQ=Qk>?@> CHPF@CH=f?QdQ Œ=>C>?RH. Position[i] = 0;

for(j=1; j<m; j++) // c@P= AQ Œ=>C>?RHC <>PRQBH.

{

if(pRovs[j]>MaxElem[i])

{

//jHAQC@?H>C ?Q<Q> I?HJ>?@>

//CHPF@CH=f?QdQŒ=>C>?RH.

MaxElem[i] = pRovs[j];

//jHAQC@?H>C ?Q<Q> AQ=Qk>?@>

//CHPF@CH=f?QdQ Œ=>C>?RH. Position[i] = j;

}// ]Q?>c bF=Q<@; if.

}// ]Q?>c c@P=H for AQ j.

}// ]Q?>c c@P=H for AQ i.

}// ]Q?>c ab?Pc@@ FindMaxAndPos.

/////////////////////////////////////////////////////////

///////

// t=H<?H; ABQdBHCCH. void main()

{

setlocale(LC_CTYPE, "Russian_Russia.1251"); int **Matrix, *MaxElem, *Position;

int n, m;

cout << "]Q=@J>FR<Q FRBQP > "; cin >> n;

cout << "]Q=@J>FR<Q FRQ=9cQ<> ";

Matrix = new int*[n];// CHRB@cH.

//‚D^>=>?@> AHC;R@ ^=; PHk^QK FRBQP@ ^<bEC>B?QK

//CHRB@cD @ >’ IHAQ=?>?@> F=bJHK?DC@ J@F=HC@. for(int i=0; i<n; i++)

{

Matrix[i] = new int[m]; FormkVect(Matrix[i], m);

}

//eHEQ^@C CHPF@CH=f?D> Œ=>C>?RD @ @E AQI@c@@. FindMaxAndPos(Matrix, MaxElem, Position, n, m);

//‚D<Q^ < QP?Q CHRB@cD

for(int i=0; i<n; i++) WriteVect("", Matrix[i], m);

cout << endl;

//‚D<Q^ < QP?Q CHPF@CH=f?DE Œ=>C>?RQ<. WriteVect("qHPF. Œ=>C>?R: ", MaxElem, n);

//‚D<Q^ < QP?Q AQI@c@@ CHPF@CH=f?DE Œ=>C>?RQ<.

//8F<Q9Qk^>?@> AHC;R@. for(int i=0; i<n; i++)

delete Matrix[i]; delete Matrix;

//†^>C ?HkHR@; =m9QK P=H<@w@ P=H<@HRbBD. system("pause");

}// ]Q?>c ab?Pc@@ _tmain.

189

D. 6.7. D Ex06_06

6.5. W8 6 4 ?9 / AO/8P99

e, , ; -

, Z ; . + C++ -

( ).

D = , -

; =:

double sin(double x); double cos(double x); double sqrt(double x); double MyFunc(double x); double Function35(double x);

Z = ;

double (*pfd)(double);

=

double Discr(double *x, int n, int m); double Matr (double *a, int n1, int n2);

190

double (*pf) (double*, int, int);

: ; ;@ =

:

const double PI = 3.1415926535897932; double y;

double (*pf)(double); // Q9:;<=>?@> bPHIHR>=; ?H ab?Pc@m.

pf = sin; // bPHIHR>=f ?H FRH?^HBR?Dm ab?Pc@m sin. y = pf(PI/4.0);

cout >> "sin(PI/4) = " << y << endl;

pf = cos; // bPHIHR>=f ?H FRH?^HBR?Dm ab?Pc@m cos. y = pf(PI/2.0);

cout >> "cos(PI/2) = " << y << endl;

. Z = r = ;, - @ ;@ ; double ;@ ; double. : Z , , -

= sin:

s Z ,

, , :

y = pf(PI/4.0);

? Z y

= sin(#$4). Z

= cos.

!, Z -

=, Z ;@ ; .

6.6.