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g = 10;
licznik=0;
 
ar1x=3;
ar1y=linspace(2,8,1000);
ar2x=10;
ar2y=linspace(4,6,1000);
 
fr1x=linspace(4,6,1000);
fr1y=7;
fr2x=linspace(6,8,1000);
fr2y=5;
 
 
figure (1);
successes = 0;
tries = 100000;
for i=1:tries
    v0 = rand() * 35 + 5;
    alfa = rand() * 80 + 5; 
    range = (2*(v0^2)*sind(alfa)*cosd(alfa))/g;
 
    a = 2; b = 8; x = 3;
    cond1 = isCrossedY(x, a, b, alfa, v0, g);
    a = 4; b = 6; x = 10;
    cond2 = isCrossedY(x, a, b, alfa, v0, g);
    a = 4; b = 6; y = 7;
    cond3 = isCrossedX(y, a, b, alfa, v0, g);
    a = 6; b = 8; y = 5;
    cond4 = isCrossedX(y, a, b, alfa, v0, g);
 
    if (cond1 && cond2 && ~cond3 && ~cond4)
        x=linspace(0,range,100);
        y=tand(alfa).*x - (g*x.^2)/((2*v0^2)*cosd(alfa)^2);
        % please comment or uncomment for task 1 and 2
        plot(x,y, 'b.');hold on;
%         plot(alfa,v0, 'r.');hold on;
        successes = successes + 1;
    end
end
 
prob = successes/tries;
 
% please comment or uncomment for task 1 and 2
plot(ar1x, ar1y, 'g.');hold on;
plot(ar2x,ar2y, 'g.');hold on;
plot(fr1x, fr1y, 'r.');hold on;
plot(fr2x,fr2y, 'r.');hold on;
xlim([0, 11]);
xlabel ('x');
ylabel('y');
title ('Zadanie 1');
 
% please comment or uncomment for task 1 and 2
% xlim([15, 90]);
% ylim([10, 30]);
% xlabel ('alfa');
% ylabel('v0');
% title ('Zadanie 2');

Main.java:1: error: class, interface, or enum expected
g = 10;
^
Main.java:2: error: class, interface, or enum expected
licznik=0;
^
Main.java:4: error: class, interface, or enum expected
ar1x=3;
^
Main.java:5: error: class, interface, or enum expected
ar1y=linspace(2,8,1000);
^
Main.java:6: error: class, interface, or enum expected
ar2x=10;
^
Main.java:7: error: class, interface, or enum expected
ar2y=linspace(4,6,1000);
^
Main.java:9: error: class, interface, or enum expected
fr1x=linspace(4,6,1000);
^
Main.java:10: error: class, interface, or enum expected
fr1y=7;
^
Main.java:11: error: class, interface, or enum expected
fr2x=linspace(6,8,1000);
^
Main.java:12: error: class, interface, or enum expected
fr2y=5;
^
Main.java:15: error: class, interface, or enum expected
figure (1);
^
Main.java:16: error: class, interface, or enum expected
successes = 0;
^
Main.java:17: error: class, interface, or enum expected
tries = 100000;
^
Main.java:18: error: class, interface, or enum expected
for i=1:tries
^
Main.java:20: error: class, interface, or enum expected
    alfa = rand() * 80 + 5; 
    ^
Main.java:21: error: class, interface, or enum expected
    range = (2*(v0^2)*sind(alfa)*cosd(alfa))/g;
    ^
Main.java:23: error: class, interface, or enum expected
    a = 2; b = 8; x = 3;
    ^
Main.java:23: error: class, interface, or enum expected
    a = 2; b = 8; x = 3;
           ^
Main.java:23: error: class, interface, or enum expected
    a = 2; b = 8; x = 3;
                  ^
Main.java:24: error: class, interface, or enum expected
    cond1 = isCrossedY(x, a, b, alfa, v0, g);
    ^
Main.java:25: error: class, interface, or enum expected
    a = 4; b = 6; x = 10;
    ^
Main.java:25: error: class, interface, or enum expected
    a = 4; b = 6; x = 10;
           ^
Main.java:25: error: class, interface, or enum expected
    a = 4; b = 6; x = 10;
                  ^
Main.java:26: error: class, interface, or enum expected
    cond2 = isCrossedY(x, a, b, alfa, v0, g);
    ^
Main.java:27: error: class, interface, or enum expected
    a = 4; b = 6; y = 7;
    ^
Main.java:27: error: class, interface, or enum expected
    a = 4; b = 6; y = 7;
           ^
Main.java:27: error: class, interface, or enum expected
    a = 4; b = 6; y = 7;
                  ^
Main.java:28: error: class, interface, or enum expected
    cond3 = isCrossedX(y, a, b, alfa, v0, g);
    ^
Main.java:29: error: class, interface, or enum expected
    a = 6; b = 8; y = 5;
    ^
Main.java:29: error: class, interface, or enum expected
    a = 6; b = 8; y = 5;
           ^
Main.java:29: error: class, interface, or enum expected
    a = 6; b = 8; y = 5;
                  ^
Main.java:30: error: class, interface, or enum expected
    cond4 = isCrossedX(y, a, b, alfa, v0, g);
    ^
Main.java:32: error: class, interface, or enum expected
    if (cond1 && cond2 && ~cond3 && ~cond4)
    ^
Main.java:34: error: class, interface, or enum expected
        y=tand(alfa).*x - (g*x.^2)/((2*v0^2)*cosd(alfa)^2);
        ^
Main.java:35: error: class, interface, or enum expected
        % please comment or uncomment for task 1 and 2
        ^
Main.java:36: error: unclosed character literal
        plot(x,y, 'b.');hold on;
                  ^
Main.java:36: error: unclosed character literal
        plot(x,y, 'b.');hold on;
                     ^
Main.java:36: error: class, interface, or enum expected
        plot(x,y, 'b.');hold on;
                        ^
Main.java:37: error: class, interface, or enum expected
%         plot(alfa,v0, 'r.');hold on;
^
Main.java:37: error: unclosed character literal
%         plot(alfa,v0, 'r.');hold on;
                        ^
Main.java:37: error: unclosed character literal
%         plot(alfa,v0, 'r.');hold on;
                           ^
Main.java:37: error: class, interface, or enum expected
%         plot(alfa,v0, 'r.');hold on;
                              ^
Main.java:38: error: class, interface, or enum expected
        successes = successes + 1;
        ^
Main.java:39: error: class, interface, or enum expected
    end
    ^
Main.java:44: error: class, interface, or enum expected
% please comment or uncomment for task 1 and 2
^
Main.java:45: error: unclosed character literal
plot(ar1x, ar1y, 'g.');hold on;
                 ^
Main.java:45: error: unclosed character literal
plot(ar1x, ar1y, 'g.');hold on;
                    ^
Main.java:45: error: class, interface, or enum expected
plot(ar1x, ar1y, 'g.');hold on;
                       ^
Main.java:46: error: class, interface, or enum expected
plot(ar2x,ar2y, 'g.');hold on;
^
Main.java:46: error: unclosed character literal
plot(ar2x,ar2y, 'g.');hold on;
                ^
Main.java:46: error: unclosed character literal
plot(ar2x,ar2y, 'g.');hold on;
                   ^
Main.java:46: error: class, interface, or enum expected
plot(ar2x,ar2y, 'g.');hold on;
                      ^
Main.java:47: error: class, interface, or enum expected
plot(fr1x, fr1y, 'r.');hold on;
^
Main.java:47: error: unclosed character literal
plot(fr1x, fr1y, 'r.');hold on;
                 ^
Main.java:47: error: unclosed character literal
plot(fr1x, fr1y, 'r.');hold on;
                    ^
Main.java:47: error: class, interface, or enum expected
plot(fr1x, fr1y, 'r.');hold on;
                       ^
Main.java:48: error: class, interface, or enum expected
plot(fr2x,fr2y, 'r.');hold on;
^
Main.java:48: error: unclosed character literal
plot(fr2x,fr2y, 'r.');hold on;
                ^
Main.java:48: error: unclosed character literal
plot(fr2x,fr2y, 'r.');hold on;
                   ^
Main.java:48: error: class, interface, or enum expected
plot(fr2x,fr2y, 'r.');hold on;
                      ^
Main.java:49: error: class, interface, or enum expected
xlim([0, 11]);
^
Main.java:50: error: class, interface, or enum expected
xlabel ('x');
^
Main.java:51: error: class, interface, or enum expected
ylabel('y');
^
Main.java:52: error: class, interface, or enum expected
title ('Zadanie 1');
^
Main.java:52: error: unclosed character literal
title ('Zadanie 1');
       ^
Main.java:52: error: unclosed character literal
title ('Zadanie 1');
                 ^
Main.java:54: error: class, interface, or enum expected
% please comment or uncomment for task 1 and 2
^
Main.java:56: error: class, interface, or enum expected
% ylim([10, 30]);
^
Main.java:57: error: class, interface, or enum expected
% xlabel ('alfa');
^
Main.java:57: error: unclosed character literal
% xlabel ('alfa');
          ^
Main.java:57: error: unclosed character literal
% xlabel ('alfa');
               ^
Main.java:58: error: class, interface, or enum expected
% ylabel('v0');
^
Main.java:58: error: unclosed character literal
% ylabel('v0');
         ^
Main.java:58: error: unclosed character literal
% ylabel('v0');
            ^
Main.java:59: error: class, interface, or enum expected
% title ('Zadanie 2');
^
Main.java:59: error: unclosed character literal
% title ('Zadanie 2');
         ^
Main.java:59: error: unclosed character literal
% title ('Zadanie 2');
                   ^
77 errors

Standard output is empty