Write Tabular Data to Text File Write a short table of the exponential function to a text file called exp.txt.

A = input('Enter A: ');
B = input('Enter B: ');
func = @(x) exp(x)-2*cos(x); 
e = 1;                      
while e>0.0001  
    display(A)
    display(B)
    C  = (A+B)/2
    FC = func(C);
    FB = func(B);
    if(FC*FB>0)
        B = C;
    else
        A = C;
    end
    e = (abs((FB-FC)/FB))*100

    fprintf(fileID,'%6s %12s\r\n','A','B','C','e');
  end

[James Tursa]

What is your question?

[Angkhana Noyhiran]

I would like the program to display square like this

i       m     f(m)       error
1  1.500000  3.875000  0.500000
2  1.750000  6.609375  0.250000
3  1.875000  8.216797  0.125000
4  1.937500  9.085693  0.062500
5  1.968750  9.537079  0.031250
6  1.984375  9.767086  0.015625
7  1.992188  9.883178  0.007812
8  1.996094  9.941498  0.003906
9  1.998047  9.970726  0.001953
10 1.999023  9.985357  0.000977
11 1.999512  9.992677  0.000488
12 1.999756  9.996338  0.000244
13 1.999878  9.998169  0.000122
14 1.999939  9.999084  0.000061
15 1.999969  9.999542  0.000031
16 1.999985  9.999771  0.000015
17 1.999992  9.999886  0.000008
18 1.999996  9.999943  0.000004
19 1.999998  9.999971  0.000002
20 1.999999  9.999986  0.000001

[Azzi Abdelmalek]

Angkhana, please edit your original question.

[Azzi Abdelmalek]

Look at edited answer

Answer 1

[Azzi Abdelmalek]

Edit

A = input('Enter A: ');
B = input('Enter B: ');
func = @(x) exp(x)-2*cos(x); 
e = 1;
fileID=fopen('fic.txt','w')
fprintf(fileID,'%s \t %s\t %s\t %s  \r\n','i','m','f(m)','error');
while e>0.0001  
display(A)
display(B)
C  = (A+B)/2
FC = func(C);
FB = func(B);
if(FC*FB>0)
    B = C;
else
    A = C;
end
e = (abs((FB-FC)/FB))*100
fprintf(fileID,'%6f %6f %6f %6f\r\n',[A,B,C,e]);
end
fclose(fileID)