[問題] variable 的值已回收
code如下:
function res = test_nested_1
a = 1; b = 2; x = 0; y = 9;
fprintf('Before call to fun1:\n');
fprintf('a, b, x, y = %2d %2d %2d %2d\n', a, b, x, y);
x = fun1(x);
fprintf('\nAfter call to fun1:\n');
fprintf('a, b, x, y = %2d %2d %2d %2d\n', a, b, x, y);
function res = fun1(y)
fprintf('\nAt start of call to fun1:\n');
fprintf('a, b, x, y = %2d %2d %2d %2d\n', a, b, x, y);
y = y + 5;
a = a + 1;
res = y;
fprintf('\nAt end of call to fun1:\n');
fprintf('a, b, x, y = %2d %2d %2d %2d\n', a, b, x, y);
end
end
輸出如下:
>> test_nested_1
Before call to fun1:
a, b, x, y = 1 2 0 9
At start of call to fun1:
a, b, x, y = 1 2 0 0
At end of call to fun1:
a, b, x, y = 2 2 0 5
After call to fun1:
a, b, x, y = 2 2 5 9
請問為何最後的y是9呢?
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