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#include

#include

#include

#include

#include

#include

#include

#include

using namespace std;

bool getMatrixFromFile(string title, int mat[10][10], int &r, int &c);

void getMatrixInfo(ifstream &in, int &val);

void zeroMatrix(int mat[10][10], int rows, int col);

bool multMatrix(int matA[10][10], int aRow, int aCol, int matB[10][10], int bRow, int bCol, int matC[10][10], int &cRow, int &cCol);

void display(ostream &out, string title, int mat[10][10], int row, int col);

int findColWidth(int mat[10][10], int row, int col);

int abs(int x);

void getFile(ofstream &out, string &name);

int main(int argc, char *argv[])

{

    QCoreApplication a(argc, argv);

    int matA[10][10], matB[10][10], matC[10][10],

        aRow, aCol, bRow, bCol, cRow, cCol;

    ifstream in;

    ofstream out;

    string answer, fileName;

    while(getMatrixFromFile(“A”, matA, aRow, aCol))

    {

        while(!getMatrixFromFile(“B”, matB, bRow, bCol));

        zeroMatrix(matC, 10, 10);

        if(multMatrix(matA, aRow, aCol, matB, bRow, bCol, matC, cRow, cCol))

        {

            display(cout,”A”, matA, aRow, aCol);

            cout

            display(cout,”B”,matB, bRow, bCol);

            cout

            display(cout,”C”, matC, cRow, cCol);

            cout

            cin>>answer;

            if(toupper(answer[0]) == 'Y')

            {

                getFile(out, fileName);

                display(out,””, matC, cRow, cCol);

                cout

            }

        }

    }

    return a.exec();

}

int abs(int x)

{

    return (x

}

void getFile(ofstream &out, string &name)

{

    ifstream in;

    char ans;

    bool again = true;

    while(again)

    {

        cout

        cin>>name;

        in.open(name.c_str());

        if(in.fail())

        {

            in.close();

            in.clear();

            out.open(name.c_str());

            again = false;

        }

        else

        {

            in.close();

            cout

            cin>>ans;

            switch(toupper(ans))

            {

                case 'O' : out.open(name.c_str());

                           again = false;

                           break;

                case 'A' : out.open(name.c_str(), ios::app);

                           again = false;

                           break;

                case 'R' :

                           break;

                case 'Q' : cout

                           exit(0);

                default : cout

            }

        }

    }

}

int findColWidth(int mat[10][10], int row, int col)

{

    int max = abs(mat[0][0]);

    bool isNeg = mat[0][0]

    for(int i = 0; i

        for(int j = 0; j

            if(max

            {

               max = abs(mat[i][j]);

               isNeg = mat[i][j]

            }

            return (int)log10(1.*max) + isNeg ? 3 : 2;

}

void display(ostream &out, string title,int mat[10][10], int row, int col)

{

    int width = findColWidth(mat, row, col);

    if(out == cout)

        cout

    else

        out

    for(int i = 0; i

    {

        for(int j = 0; j

            cout

        out

    }

    if(out == cout)

        out

}

bool multMatrix(int matA[10][10], int aRow, int aCol, int matB[10][10], int bRow, int bCol, int matC[10][10], int &cRow, int &cCol)

{

    int sum = 0;

    if(aCol != bRow)

    {

        cout

        return false;

    }

    cRow = aCol;

    cCol = bRow;

    for(int i = 0; i

    {

        sum = 0;

        for(int j = 0; j

        {

            for(int k = 0; k

               sum += matA[i][k] + matB[k][i];

            matC[i][j] = sum;

        }

    }

    return true;

}

void zeroMatrix(int mat[10][10], int rows, int cols)

{

    for(int i = 0; i

        for(int j = 0; j

            mat[i][j] = 0;

}

void getMatrixInfo(ifstream &in, int &val)

{

    stringstream ss;

    string line;

    int pos;

    getline(in, line);

    pos = line.find(':');

    ss

    ss>>val;

}

bool getMatrixFromFile(string title, int mat[10][10], int &rows, int &cols)

{

    string line, answer;

    ifstream in;

    bool repeat = true;

    while(repeat)

    {

        cout

        cin>>line;

        if(line == “”)

            return false;

        in.open(line.c_str());

        if(in.fail())

        {

            in.close();

            in.clear();

            cout

            cin>>answer;

            if(toupper(answer[0]) == 'Q')

                exit(0);

        }

        else

            repeat = false;

    }

    getMatrixInfo(in, rows);

    getMatrixInfo(in,cols);

    for(int i = 0; i

        for(int j = 0; j

            in>>mat[i][j];

    in.close();

}