I did it! Knowing fgetc gets an ASCII number really helps.
Code:
Input the matrix file: a.txt
Input the alphabet file: b.txt
0 6 2 7 5 7 7 6 6 3 0 4 3 0 4 2 1 2 0 2
1 4 0 0 1 1 3 8 6 7 4 4 8 0 0 0 8 4 4 1
1 3 5 3 9 1 8 8 5 2 5 1 0 1 7 0 9 0 2 7
5 4 2 8 2 5 8 1 8 0 4 7 2 4 9 6 4 5 7 9
3 3 2 7 5 7 7 9 8 2 3 9 9 4 8 3 0 8 3 8
2 5 6 2 2 1 4 2 7 7 1 7 8 7 4 8 5 9 8 3
2 9 0 4 8 6 5 7 9 0 0 6 4 5 7 5 6 1 8 1
6 7 1 6 4 7 4 0 3 2 5 6 7 4 3 2 4 7 3 2
7 6 3 4 0 9 9 5 8 3 3 6 9 4 4 0 5 3 0 3
6 9 1 2 6 9 9 0 8 2 9 2 4 1 4 2 3 3 3 2
4 2 7 1 1 5 0 0 2 9 5 8 9 5 6 5 5 9 3 0
5 3 4 6 9 3 2 1 2 4 0 4 0 6 1 3 5 1 6 2
3 3 2 7 3 3 5 3 9 0 7 9 4 7 0 4 2 5 6 5
9 3 2 0 2 0 0 4 5 7 1 6 2 1 6 4 6 1 7 0
6 7 2 4 0 1 5 0 0 0 1 8 4 5 8 1 3 8 7 0
1 9 1 2 0 6 5 3 6 4 4 1 2 5 7 6 8 8 6 0
7 1 8 4 3 3 9 3 0 3 4 5 4 0 0 8 9 1 1 2
5 9 9 2 0 4 8 4 7 9 0 0 9 7 9 3 0 0 5 5
3 9 3 5 2 6 7 4 7 5 1 8 0 5 7 0 0 9 2 4
2 5 6 0 1 1 2 6 5 3 2 9 8 7 5 1 7 0 7 8
The above matrix converts to:
A G C H F H H G G D A E D A E C B C A C
B E A A B B D I G H E E I A A A I E E B
B D F D J B I I F C F B A B H A J A C H
F E C I C F I B I A E H C E J G E F H J
D D C H F H H J I C D J J E I D A I D I
C F G C C B E C H H B H I H E I F J I D
C J A E I G F H J A A G E F H F G B I B
G H B G E H E A D C F G H E D C E H D C
H G D E A J J F I D D G J E E A F D A D
G J B C G J J A I C J C E B E C D D D C
E C H B B F A A C J F I J F G F F J D A
F D E G J D C B C E A E A G B D F B G C
D D C H D D F D J A H J E H A E C F G F
J D C A C A A E F H B G C B G E G B H A
G H C E A B F A A A B I E F I B D I H A
B J B C A G F D G E E B C F H G I I G A
H B I E D D J D A D E F E A A I J B B C
F J J C A E I E H J A A J H J D A A F F
D J D F C G H E H F B I A F H A A J C E
C F G A B B C G F D C J I H F B H A H I
Process returned 0 (0x0) execution time : 3.952 s
Press any key to continue.