Чему будет равно значение переменной b после выполнения фрагмента программы?
b=0
a=-1
for i=1 to 3
x=a*i
a=-a
b=b+x
next i
b=0
a=-1
for i=1 to 3
x=a*i
a=-a
b=b+x
next i
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Answers & Comments
i = 1, b = 0, a = -1
x = -1 * 1 = -1
a = -(-1) = 1
b = 0 + (-1) = -1
2 шаг
i = 2 b = -1 a = 1
x = 1*2 = 2
a = -1
b = -1 + 2 = 1
3 шаг
i = 3 b = 1 a = -1
x = -1*3 = -3
a = 1
b = 1+(-3) = -2