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#include <iostream>
#include <iomanip>
using namespace std;
 
const int ROWS = 3;
const int COLS = 4;
 
void getTotal(int[ROWS][COLS], int &);
void getAverage(int[ROWS][COLS], double&);
void getRowTotal(int[ROWS][COLS], int, int&);
void getColumnTotal(int[ROWS][COLS], int, int&);
void getHighestInRow(int[ROWS][COLS], int, int&);
void getLowestInRow(int[ROWS][COLS], int, int&);
void tblImg(int[ROWS][COLS]); //values table
void err(); //fix cin errors
 
int main(){
    char again = 'y';
    while (again == 'y' || again == 'Y'){
        int arrayx[ROWS][COLS] = { { 31, 41, 11, 91 }, { 62, 32, 72, 12 }, { 93, 73, 33, 23 } },
            ttl = 0, trow = 0, tcol = 0, hrow = 0, lrow = 0, usrRow = 0, usrCol = 0;
        double avg = 0;
 
        tblImg(arrayx); //display table to user
 
        cout << "Enter a Row (1-3): ";
        cin >> usrRow;
        while (cin.fail() || usrRow < 1 || usrRow > 3){ //fix letter and negative
            err();
            cout << "Enter a Row (1-3): ";
            cin >> usrRow;
        }
 
        cout << "Enter a Column (1-4): ";
        cin >> usrCol;
        while (cin.fail() || usrCol < 1 || usrCol > 4){ //fix letter and negative
            err();
            cout << "Enter a Column (1-4): ";
            cin >> usrCol;
        }
 
        getTotal(arrayx, ttl);
        getAverage(arrayx, avg);
        getRowTotal(arrayx, usrRow , trow);
        getColumnTotal(arrayx, usrCol, tcol);
        getHighestInRow(arrayx, usrRow, hrow);
        getLowestInRow(arrayx, usrRow, lrow);
        cout << "Total: " << ttl << endl
            << "Average: " << setprecision(2) << fixed << avg << flush << endl
            << "Row total: " << trow << endl
            << "Column total: " << tcol << endl
            << "Highest number in row is: " << hrow << endl
            << "Lowest number in row is: " << lrow << endl;
 
        cout << "\n\t\t\tEnter y or Y to repeat: ";
        cin >> again;
    }
}
void getTotal(int ttlArray[ROWS][COLS], int& ttlOut){
    for (int ir = 0; ir < ROWS; ir++){
        for (int ic = 0; ic < COLS; ic++)
            ttlOut += ttlArray[ir][ic];
    }
}
void getAverage(int avgArray[ROWS][COLS], double& avgOut){
    for (int ir = 0; ir < ROWS; ir++){
        for (int ic = 0; ic < COLS; ic++)
            avgOut += avgArray[ir][ic]; //sum
    }
    avgOut /= (ROWS*COLS); //avg
}
void getRowTotal(int rowArray[ROWS][COLS], int row, int& ttlRow){
    for (int ic = 0; ic < COLS; ic++)
        ttlRow += rowArray[row-1][ic];
}
void getColumnTotal(int colArray[ROWS][COLS], int col, int& ttlCol){
    for (int ir = 0; ir < ROWS; ir++)
        ttlCol += colArray[ir][col-1];
}
void getHighestInRow(int rowHigh[ROWS][COLS], int row, int& rowHighOut){
    for (int ic = 0; ic < COLS; ic++){
        if (rowHigh[row-1][ic] >= rowHighOut) //value greater than output, replace
            rowHighOut = rowHigh[row-1][ic];
    }
}
void getLowestInRow(int rowLow[ROWS][COLS], int row, int& rowLowOut){
    rowLowOut = rowLow[row-1][0]; //initialize
    for (int ic = 0; ic < COLS; ic++){
        if (rowLow[row-1][ic] <= rowLowOut) //output greater than value, replace
            rowLowOut = rowLow[row-1][ic];
    }
}
void tblImg(int xRay[ROWS][COLS]){
    cout << "\n       ||C1||C2||C3||C4||\n"
        << "       ------------------\n";
    for (int ir = 0; ir < ROWS; ir++){
        cout << "(Row " << ir + 1 << ")||";
        for (int ic = 0; ic < COLS; ic++)
            cout << setw(2) << setfill('0') << xRay[ir][ic] << "||";
        cout << endl;
    }
    cout << endl;
}
void err(){
    cout << "\t\t/!\\ ERROR /!\\\n";    
    cin.clear();
    fflush(stdin);
}