Simple "Sum" of Pascal
Level
pending
//This is PseudoCode
a := 1;
b := 2;
c := a + b;
sum := 0;
for i := 1 to 3 do
begin
inc(a); inc(b);
sum := sum + a + b;
sum := sum + c;
end;
writeln(sum);
What is the last result of sum ?
The answer is 36.
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1 solution
a = 1 , b = 2 , c = a + b = 3; when i = 1 : inc(a) = a + 1 = 2; inc(b) = b + 1 = 3; sum = 0 + 2 + 3 = 5; sum = 5 + c = 5 + 3 = 8;
a = 2 , b = 3 , c = a + b = 5; when i = 2 : inc(a) = a + 1 = 3; inc(b) = b + 1 = 4; sum = 8 + 3 + 4 = 15; sum = 15 + c = 15 + 5 = 20;
a = 3 , b = 4 , c = a + b = 3 + 4 = 7; when i = 3 : inc(a) = a + 1 = 4; inc(b) = b + 1 = 5; sum = 20 + 4 + 5 = 29; sum = 29 + c = 29 + 7 = 36;
the looping has stopped and the last result of sum is 36 .