Examination_IT / Programming bases on With C++

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//‚D^>=>?@> AHC;R@ ^=; EBH?>?@; Q^?QC>B?QdQ CHFF@<H

//FQFRQ;{>dQ @I 10 J@F>= R@AH int.

pA = new int[n];

// zQBC@BQ<H?@> CHFF@<H.

for(int i=0; i<n; i++) pA[i] = i;

// ‚D<Q^ FQ^>Bk@CQdQ CHFF@<H < QP?Q AB@=Qk>?@;. for(int i=0; i<n; i++) cout << pA[i] << " "; cout << endl;

delete pA; // QF<Q9Qk^>?@> AHC;R@.

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for(int i=0; i<n ; i++) ppA[i] = new int[m];

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for(int i=0; i<n ; i++) delete ppA[i]; delete ppA;

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8 58 9 6.2. !6:; Ex06_02.cpp

175

setlocale(LC_CTYPE, "Russian_Russia.1251"); int *pArray;

int n = 8, i;

bool SignConst = true;

cout << "]Q=@J>FR<Q J=>?Q< AQF=>^Q<HR>=f?QFR@> "; cin >> n;

//‚D^>=;>C AHC;R@ BQ<?Q FRQ=fPQ, FPQ=fPQ

//?>Q9EQ^@CQ AQ=fIQ<HR>=m.

pArray = new int[n];

//‚<Q^ J=>?Q< AQF=>^Q<HR>=f?QFR@ < CHFF@<. for(i=0; i<n; i++)

{

cout << "A[" << i+1 << "]> "; cin >> pArray[i];

}

//‚DAQ=?>?@> <DJ@F=>?@K.

for(i=0; i<n-1; i++) if(pArray[i]*pArray[i+1] >= 0)

{// GQF=>^Q<HR>=f?QFRf ?> I?HPQAQFRQ;??H;. SignConst = false;

break;

}

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

if(SignConst)

cout << "\n‚<>^>?H I?HPQA>B>C>??H; " "AQF=>^Q<HR>=f?QFRf.\n";

else

cout << "\n‚<>^>??H; AQF=>^Q<HR>=f?QFRf ?> " "I?HPQA>B>C>??H;.\n";

cout << endl;

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

}

177

{

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

int n, i, j;

cout << "|HIC>B P<H^BHR?QK CHRB@cD> "; cin >> n;

//‚D^>=;>C AHC;Rf, BQ<?Q FRQ=fPQ, FPQ=fPQ

//?>Q9EQ^@CQ AQ=fIQ<HR>=m.

ppArray = new double*[n]; for(i=0; i<n; i++)

ppArray[i] = new double[n];

//zQBC@BQ<H?@> CHRB@cD @ <D<Q^ >’ < QP?Q

//AB@=Qk>?@;.

cout << "„FEQ^?H; CHRB@cH:\n"; for(i=0; i<n; i++)

{

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

{

ppArray[i][j] = (double)(rand()%500)/100.0; cout << setw(5) << ppArray[i][j];

}

cout << endl;

}

cout << endl;

//uBH?FAQ?@BQ<H?@> CHRB@cD. for(i=0; i<n-1; i++)

for(j=i+1; j<n; j++)

{

Buffer = ppArray[j][i]; ppArray[j][i] = ppArray[i][j]; ppArray[i][j] = Buffer;

}

//‚D<Q^ CHRB@cD < QP?Q AB@=Qk>?@;. cout << "uBH?FAQ?@BQ<H??H; CHRB@cH:\n"; for(i=0; i<n; i++)

{

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

178

cout << setw(5) << ppArray[i][j]; cout << endl;

}

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

delete ppArray[i]; delete ppArray;

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

}

D. 6.5. D Ex06_03

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8 58 9 6.4. !6:; Ex06_04.cpp

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

//|>wH>R P<H^BHR?Q> bBH<?>?@> <@^H a*x^2 + b*x + c = 0.

//‚QI<BH{H>R true < F=bJH> <>{>FR<>??DE PQB?>K @ false

//< @?QC F=bJH>.

bool Quadratic(double a, double b, double c, double *x1, double *x2)

{

double D;

D = b*b - 4.0*a*c;

if(D < 0) return false; // <>{>FR<>??DE PQB?>K ?>R.

180

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

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

return true;

}

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

void main()

{

setlocale(LC_CTYPE, "Russian_Russia.1251");

//eHJH=f?H; @?@c@H=@IHc@; PQŒaa@c@>?RQ<

//P<H^BHR?QdQ bBH<?>?@;.

double a = 1, b=1, c=-6;

//]QB?@ P<H^BHR?QdQ bBH<?>?@; double x1, x2;

//z=Hd.

bool MaterialRoots;

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

cout << "‚>{>FR<>??D> PQB?@: x1 = " << x1 <<", x2 = " << x2 << endl;

else

cout << "‚>{>FR<>??DE PQB?>K ?>R." << endl;

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

}

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