charcters saved as ASCII in matrix

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Tor Fredrik Hove
Tor Fredrik Hove 2011-11-6
I have a function that works fine
function threeinarow=isWinner(A,s)
count=0;
threeinarow='false';
for i=1:size(A,1)
for j=1:size(A,2)
if strcmp(A(i,j),s)
count=count+1;
if count==size(A,2)
threeinarow='true'
end
end
end
count=0;
end
for i=1:size(A,1)
for j=1:size(A,2)
if strcmp(A(j,i),s)
count=count+1;
if count==size(A,1)
threeinarow='true'
end
end
end
count=0;
end
i=1;
for j=1:size(A,2)
if strcmp(A(j,i),s)
count=count+1;
if count==size(A,1)
threeinarow='true'
end
i=i+1;
end
end
count=0;
i=size(A,1);
for j=1:size(A,2)
if strcmp(A(j,i),s)
count=count+1;
if count==size(A,1)
threeinarow='true'
end
i=i-1;
end
end
I tried to apply the function above to a script that creates the matrix that the function above asks for input in variable A but as I put in a character for one index in the matrix C below like 'x' it gets stored in the matrix as the ASCII-number instead of the character and the function isWinner can't function (at least this seems to be the problem). How do I change this? Here is the function:
C=ones(3,3);
finished=0;
while finished==0
r=input('write roow for x: ');
k=input('write column for for x: ');
while C(r,k)~=1
fprintf('coordinates %d, %d are taken by %c\n', r, k, C(r,k))
r=input('write row for x: ');
k=input('write column for x: ');
end
C(r,k)='x';
check=isWinner(C,'x');
if strcmp(check,'true')
disp('x wins')
finished=1;
end
if finished==0
r=input('write row for 0: ');
k=input('write column for 0: ');
while C(r,k)~=1
fprintf('coordinates %d, %d are taken by %c\n', r, k, C(r,k))
r=input('write row for 0: ');
k=input('write column for 0: ');
end
C(r,k)='0';
check=isWinner(C,'0');
if strcmp(check,'true')
disp('0 wins');
finished=1;
end
end
end

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采纳的回答

Walter Roberson
Walter Roberson 2011-11-6
Do not initialize your
C=ones(3,3);
Instead,
C = char(zeros(3,3));
By the way, have you considered using the logical constants true and false instead of the strings 'true' and 'false' ?
  2 个评论
Tor Fredrik Hove
Tor Fredrik Hove 2011-11-6
thank you very much!
I wonder why the answer sheet for the assignment works. They start up with a 3 times 3 zero-matrix but still the game works. It is here:
function vinner = tripptrapp
Brett = [0 0 0; 0 0 0; 0 0 0];
spiller = 'x';
vinner = 0;
while (tellPlasser(Brett) > 0 && vinner == 0)
rad = input(sprintf('%s, choose row: ', spiller));
kolonne = input(sprintf(' %s, choose column: ', spiller));
if (Brett(rad,kolonne) == 0)
Brett(rad,kolonne) = spiller;
if (erVinnerfasit(spiller, Brett))
vinner = spiller;
disp(sprintf(' %s won!', spiller));
end
if (spiller == 'x')
spiller = 'o';
else
spiller = 'x';
end
else
disp('already taken coordinates!');
end
end
if (vinner == 0)
disp('It''s a tie!');
end
Tor Fredrik Hove
Tor Fredrik Hove 2011-11-6
it uses theese two functions:
function vinner = erVinnerfasit(spiller, Brett)
vinner = 0;
diagonalt_fra_hoyre = 0;
diagonalt_fra_venstre = 0;
for i=1:size(Brett)
horisontalt = 0;
vertikalt = 0;
for j=1:size(Brett, 2)
if (Brett(i,j) == spiller)
horisontalt = horisontalt + 1;
end
if (Brett(j,i) == spiller)
vertikalt = vertikalt + 1;
end
if (i==j && Brett(j, i) == spiller)
diagonalt_fra_venstre = diagonalt_fra_venstre + 1;
end
if (((i==3 && j==1) || (i==2 && j==2) || (i==1 && j==3)) &&
Brett(i,j)==spiller)
diagonalt_fra_hoyre = diagonalt_fra_hoyre + 1;
end
end
if (diagonalt_fra_venstre == 3 || diagonalt_fra_hoyre == 3 ||
vertikalt == 3 || horisontalt == 3)
vinner = 1;
break;
end
end
the second function it uses:
function out=tellPlasser(A)
[N M]=size(A);
num=0;
for i=1:N
for j=1:M
if A(i,j)==0
num=num+1;
end
end
end
out=num;

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