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PR1-Spreadsheet
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// evaluateCell() implemented + some error corrections

main
Emelie Schneider 2024-01-04 23:50:06 +01:00
parent 5a69f8b0f5
commit 23d6c57683
5 changed files with 308 additions and 27 deletions
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6
.classpath 100644
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@ -0,0 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="src" path="Axel/src"/>
<classpathentry kind="output" path="bin"/>
</classpath>

17
.project 100644
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@ -0,0 +1,17 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>PR1-Spreadsheet</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>

52
Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
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@ -2,6 +2,8 @@ package de.hs_mannheim.informatik.spreadsheet;
//m
import java.io.FileNotFoundException;
import java.util.Scanner;
/**
* Part of a simplified spreadsheet system for the PR1 programming lab at Hochschule Mannheim.
*
@ -11,6 +13,13 @@ public class Axel {
public static void main(String[] args) throws FileNotFoundException {
Spreadsheet spr = new Spreadsheet(10,10);
Scanner sc= new Scanner(System.in);
boolean exit=false;
String readInput;
String currentCell;
String formula;
spr.put("A3", "123");
spr.put("A2", "1");
@ -19,11 +28,54 @@ public class Axel {
spr.put("J5", "=7*6");
spr.put("J6", "=3/2");
//add some values for testing
spr.put("B1", "10");
spr.put("B2", "5");
spr.put("B3", "8");
//
System.out.println(spr);
spr.saveCsv("/tmp/test.csv");
// TODO: You might want to put "UI loop" for entering value and formulas here resp. in some UI methods.
do {
//set values in cells
System.out.println("cell:");
readInput= sc.nextLine();
currentCell=readInput;
System.out.println("Set:");
readInput= sc.nextLine();
formula=readInput;
spr.put(currentCell, formula);
System.out.println(spr);
System.out.println();
// System.out.println("Exit? j/n");
// readInput= sc.nextLine();
if(readInput.equals("j"))
exit=true;
}
while(!exit);
System.out.println("Programmende.");
}
}

1
Axel/src/de/hs_mannheim/informatik/spreadsheet/Cell.java
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@ -1,5 +1,6 @@
package de.hs_mannheim.informatik.spreadsheet;
//
/**
* Part of a simplified spreadsheet system for the PR1 programming lab at Hochschule Mannheim.
* A cell needs to be able to hold a formula and a value

255
Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
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@ -6,6 +6,8 @@ import java.io.PrintWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.ArrayList;
/**
* A simplified spreadsheet class for the PR1 programming lab at Hochschule Mannheim.
* One aspect worth mentioning is that it only supports long numbers, not doubles.
@ -127,32 +129,19 @@ public class Spreadsheet {
String sum1;
String sum2;
if (formula.startsWith("SUMME(")) { // e.g. SUMME(A3:A8) //SUMME(A13:B22)
/* if(Character.isDigit(formula.charAt(8))) {
sum1= formula.substring(6, 9);
if(Character.isDigit(formula.charAt(12))) {
sum2=formula.substring(10,13);
}else sum2=formula.substring(10,12);
}else {
sum1= formula.substring(6, 8);
if(Character.isDigit(formula.charAt(11))) {
sum2=formula.substring(9,12);
}else sum2=formula.substring(9,11);
} */
if (formula.startsWith("SUMME(")) // e.g. SUMME(A3:A8) //SUMME(A13:B22)
result = "" + sum(getStartCellName(formula), getEndCellName(formula)); // TODO adapt to cells with two digits
}
else if (formula.startsWith("PRODUKT(")) // e.g. PRODUKT(A3:B9)
result = "TODO"; // TODO
result = "" + prod(getStartCellName(formula),getEndCellName(formula)); // TODO
else if (formula.startsWith("MITTELWERT(")) // e.g. MITTELWERT(A3:A5)
result = "TODO"; // TODO
result = ""+ average(getStartCellName(formula),getEndCellName(formula)); // TODO
else if (formula.startsWith("STABW(")) // e.g. STABW(C6:D8) -> Standardabweichung
result = "TODO"; // TODO
result = "" + stDev(getStartCellName(formula),getEndCellName(formula)); // TODO
else if (formula.startsWith("MIN(")) // e.g. MIN(C13:H13) -> größter Wert
result = "TODO"; // TODO
result = ""+ min(getStartCellName(formula), getEndCellName(formula));
else if (formula.startsWith("MAX(")) // e.g. MAX(A1:A10) -> Standardabweichung
result = "TODO"; // TODO
result = ""+ max(getStartCellName(formula), getEndCellName(formula)); // TODO
else if (!formula.isEmpty()) {
try {
result = "" + calculate(formula);
@ -167,7 +156,7 @@ public class Spreadsheet {
/**
* Method for calculating the sum of a rectangular block of cells, such as from A1 to B3.
* @param startCellName The name of the cell in the upper left corner of the rectangle.
* @param endCellName The name of the cell in the lower right corner of the rectangle.
* @param endCellName The name of the cell in the lower right corner ofODO the rectangle.
* @return The sum calculated.
*/
private long sum(String startCellName, String endCellName) {
@ -178,7 +167,7 @@ public class Spreadsheet {
int endRow=0;
int endCol;
int sum=0;
long sum=0;
int temp;
startRow= getRow(startCellName);
@ -199,6 +188,178 @@ public class Spreadsheet {
return sum;
}
private long prod(String startCellName, String endCellName) {
int startRow=0;
int startCol=0;
int endRow=0;
int endCol;
long prod=1;
long temp;
startRow= getRow(startCellName);
startCol= getCol(startCellName);
endRow= getRow(endCellName);
endCol= getCol(endCellName);
for(int i= startRow; i<=endRow; i++) {
for(int j=startCol; j<=endCol; j++) {
temp= Integer.parseInt(cells[i][j].getValue());
prod=prod*temp;
}
}
return prod;
}
private int average(String startCellName, String endCellName) {
int startRow=0;
int startCol=0;
int endRow=0;
int endCol;
int sum=0;
int temp;
int part=0;
int avg=0;;
startRow= getRow(startCellName);
startCol= getCol(startCellName);
endRow= getRow(endCellName);
endCol= getCol(endCellName);
for(int i= startRow; i<=endRow; i++) {
for(int j=startCol; j<=endCol; j++) {
temp= Integer.parseInt(cells[i][j].getValue());
sum=sum+temp;
part++;
}
}
avg=sum/part;
return avg;
}
//Method to calculate the minimum
private int min(String startCellName, String endCellName) {
int startRow=0;
int startCol=0;
int endRow=0;
int endCol;
int min;
int temp;
startRow= getRow(startCellName);
startCol= getCol(startCellName);
endRow= getRow(endCellName);
endCol= getCol(endCellName);
min=Integer.parseInt(cells[startRow][startCol].getValue());
for(int i= startRow; i<=endRow; i++) {
for(int j=startCol; j<=endCol; j++) {
temp= Integer.parseInt(cells[i][j].getValue());
if(min>temp) {
min=temp;
}
}
}
return min;
}
//calculate maximum
private int max(String startCellName, String endCellName) {
int startRow=0;
int startCol=0;
int endRow=0;
int endCol;
int max;
int temp;
startRow= getRow(startCellName);
startCol= getCol(startCellName);
endRow= getRow(endCellName);
endCol= getCol(endCellName);
max=Integer.parseInt(cells[startRow][startCol].getValue());
for(int i= startRow; i<=endRow; i++) {
for(int j=startCol; j<=endCol; j++) {
temp= Integer.parseInt(cells[i][j].getValue());
if(max<temp) {
max=temp;
}
}
}
return max;
}
private int stDev(String startCellName, String endCellName) {
int startRow=0;
int startCol=0;
int endRow=0;
int endCol;
int temp;
int part=0;
int avg=0;;
int dev=0;
startRow= getRow(startCellName);
startCol= getCol(startCellName);
endRow= getRow(endCellName);
endCol= getCol(endCellName);
ArrayList<Integer> elements = new ArrayList<>();
avg= average(startCellName, endCellName);
for(int i= startRow; i<=endRow; i++) {
for(int j=startCol; j<=endCol; j++) {
temp= Integer.parseInt(cells[i][j].getValue());
temp=temp-avg;
temp= temp*temp;
elements.add(temp);
}
}
avg=0;
for(int i=0; i<elements.size(); i++) {
avg=avg+elements.get(i);
part++;
}
avg=avg/part;
dev= (int) Math.sqrt(avg);
return dev;
}
/**
* This method calculates the result of a "normal" algebraic expression. It only needs to support
* expressions like =B4 or =2+A3-B2, i.e. only with int numbers and other cells and with plus,
@ -256,18 +417,60 @@ public class Spreadsheet {
public String getStartCellName(String formula) {
String startCell="";
if(Character.isDigit(formula.charAt(8))) {
int a=0;
for(int i=0; i<formula.length(); i++) {
if(formula.charAt(i)=='(') {
a=i;
break;
}
}
if(Character.isDigit(formula.charAt(a+3))) {
startCell=formula.substring(a+1, a+4);
}else startCell=formula.substring(a+1, a+3);
//try to get the cell name for each formula not only SUMS
/* if(Character.isDigit(formula.charAt(8))) {
startCell= formula.substring(6, 9);
}else startCell= formula.substring(6, 8);
*/
System.out.println(startCell);
return startCell;
}
public String getEndCellName(String formula) {
String endCell="";
int a=0;
if(Character.isDigit(formula.charAt(8))) {
for(int i=0; i<formula.length(); i++) {
if(formula.charAt(i)=='(') {
a=i;
break;
}
}
if(Character.isDigit(formula.charAt(a+3))) {
if(Character.isDigit(formula.charAt(a+7))) {
endCell=formula.substring(a+5, a+8);
}else endCell=formula.substring(a+5, a+7);
}else{
if(Character.isDigit(formula.charAt(a+6))) {
endCell=formula.substring(a+4, a+7);
}else endCell=formula.substring(a+4, a+6);
}
System.out.println(endCell);
/* if(Character.isDigit(formula.charAt(8))) {
if(Character.isDigit(formula.charAt(12))) {
endCell=formula.substring(10,13);
}else endCell=formula.substring(10,12);
@ -276,9 +479,11 @@ public class Spreadsheet {
endCell=formula.substring(9,12);
}else endCell=formula.substring(9,11);
}
} */
return endCell;
}
}