Lucky - 6 months ago 191

Pascal Question

The code below is supposed to create a 3x4 matrix and and print the sum of all numbers each row. However, upon compiling it, I keep getting the following errors:

`jdoodle.pas(26,25) Error: Illegal qualifier`

jdoodle.pas(33,32) Error: Illegal qualifier

jdoodle.pas(41,32) Error: Illegal qualifier

jdoodle.pas(48,24) Error: Illegal qualifier

jdoodle.pas(56,4) Fatal: There were 4 errors compiling module, stopping

Fatal: Compilation aborted.

The lines in question are:

`line 26: readln (A[i, j]);`

line 33: B[i] := B[i] + A[i, j]

line 41: C[J] := C [J] + A[i,j]

line 48: write (A[i, j]:5);

Could anyone clarify this for me please? The main problem is, that I don't really know what that error code means. I have noticed that 'A[i,j]' is in all lines that are mentioned in the errors, but I just can't find out what is wrong with it.Any help would be greatly appreciated!

And here is my complete code:

`Program Matrix (input, output);`

const

ZEILENMAX = 3;

SPALTENMAX = 4;

type

tZeile = 1..ZEILENMAX;

tSpalte = 1..SPALTENMAX;

tMatrix = array[tZeile] of integer;

tZeilensumme = array [tZeile] of integer;

tSpaltensumme = array [tSpalte] of integer;

var

A : tMatrix;

B : tZeilensumme;

C : tSpaltensumme;

i : tZeile;

j : tSpalte;

begin

for i := 1 to ZEILENMAX do

for j := 1 to SPALTENMAX do

readln (A[i, j]);

for i := 1 to ZEILENMAX do

begin

B[i] := 0;

for j := 1 to SPALTENMAX do

B[i] := B[i] + A[i, j]

end;

for j := 1 to SPALTENMAX do

begin

C[j] := 0;

for i := 1 to Zeilenmax do

C[J] := C [J] + A[i,j]

end;

writeln;

for i := 1 to ZEILENMAX do

begin

for j := 1 to SPALTENMAX do

write (A[i, j]:5);

writeln (B[i]:10)

end;

writeln;

for j:= 1 to SPALTENMAX do

write (C[j]:5);

writeln

end.

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Answer Source

Let us transcript the following piece of code:

```
const
ZEILENMAX = 3;
type
tZeile = 1..ZEILENMAX;
tMatrix = array[tZeile] of integer;
var
A : tMatrix;
```

it is equal to:

```
type
tZeile = 1..3;
tMatrix = array[tZeile] of integer;
var
A : tMatrix;
```

and this is similar to:

```
type
tMatrix = array[1..3] of integer;
var
A : tMatrix;
```

Members of array `A`

can be accessed by **a single** index:
`A[1] := 0;`

but not `A[1,1] := 1`

or alike.

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