Order of operations c#
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I'm struggling with understanding why the following returns this value. Any help would be appreciated.
int ans = 10, v1 = 5, v2 = 7, v3 = 18;
ans += v1 + 10 * (v2-- / 5) + v3 / v2;
Console.WriteLine(ans);// prints 28
My thinking would be brackets first, division, multiplication then addition. So the steps would be:
v1 + 10 * (v2-- / 5) + v3 / v2
- (v2-- / 5)= 1.4, v2 is then set to 6.
- v3 / v2 = 3
- 10 * (v2-- / 5) = 14
- 5 + (14) +(3) = 12
Therefore, (ans += 12) = 22?
c# order-of-operations
edited 15 hours ago
Zoe
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up vote
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I'm struggling with understanding why the following returns this value. Any help would be appreciated.
int ans = 10, v1 = 5, v2 = 7, v3 = 18;
ans += v1 + 10 * (v2-- / 5) + v3 / v2;
Console.WriteLine(ans);// prints 28
My thinking would be brackets first, division, multiplication then addition. So the steps would be:
v1 + 10 * (v2-- / 5) + v3 / v2
- (v2-- / 5)= 1.4, v2 is then set to 6.
- v3 / v2 = 3
- 10 * (v2-- / 5) = 14
- 5 + (14) +(3) = 12
Therefore, (ans += 12) = 22?
c# order-of-operations
edited 15 hours ago
Zoe
10.1k73475
asked yesterday
9B44FD
32
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9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
Your first assumption is incorrect.?(v2-- / 5)= 1 not 1.4, because it will produce an integer result
– Martin Parkin
yesterday
So you are effectively left with10 += 5 + 10 * 1 + 3=10 += 5 + 10 + 3= 28
– Martin Parkin
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm struggling with understanding why the following returns this value. Any help would be appreciated.
int ans = 10, v1 = 5, v2 = 7, v3 = 18;
ans += v1 + 10 * (v2-- / 5) + v3 / v2;
Console.WriteLine(ans);// prints 28
My thinking would be brackets first, division, multiplication then addition. So the steps would be:
v1 + 10 * (v2-- / 5) + v3 / v2
- (v2-- / 5)= 1.4, v2 is then set to 6.
- v3 / v2 = 3
- 10 * (v2-- / 5) = 14
- 5 + (14) +(3) = 12
Therefore, (ans += 12) = 22?
c# order-of-operations
edited 15 hours ago
Zoe
10.1k73475
asked yesterday
9B44FD
32
New contributor
9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm struggling with understanding why the following returns this value. Any help would be appreciated.
int ans = 10, v1 = 5, v2 = 7, v3 = 18;
ans += v1 + 10 * (v2-- / 5) + v3 / v2;
Console.WriteLine(ans);// prints 28
My thinking would be brackets first, division, multiplication then addition. So the steps would be:
v1 + 10 * (v2-- / 5) + v3 / v2
- (v2-- / 5)= 1.4, v2 is then set to 6.
- v3 / v2 = 3
- 10 * (v2-- / 5) = 14
- 5 + (14) +(3) = 12
Therefore, (ans += 12) = 22?
c# order-of-operations
c# order-of-operations
edited 15 hours ago
Zoe
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asked yesterday
9B44FD
32
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edited 15 hours ago
Zoe
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9B44FD
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edited 15 hours ago
Zoe
10.1k73475
edited 15 hours ago
Zoe
10.1k73475
edited 15 hours ago
Zoe
10.1k73475
10.1k73475
asked yesterday
9B44FD
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asked yesterday
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asked yesterday
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I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
Your first assumption is incorrect.?(v2-- / 5)= 1 not 1.4, because it will produce an integer result
– Martin Parkin
yesterday
So you are effectively left with10 += 5 + 10 * 1 + 3=10 += 5 + 10 + 3= 28
– Martin Parkin
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday
add a comment |
I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
Your first assumption is incorrect.?(v2-- / 5)= 1 not 1.4, because it will produce an integer result
– Martin Parkin
yesterday
So you are effectively left with10 += 5 + 10 * 1 + 3=10 += 5 + 10 + 3= 28
– Martin Parkin
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday
I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
Your first assumption is incorrect.
?(v2-- / 5) = 1 not 1.4, because it will produce an integer result– Martin Parkin
yesterday
Your first assumption is incorrect.
?(v2-- / 5) = 1 not 1.4, because it will produce an integer result– Martin Parkin
yesterday
So you are effectively left with
10 += 5 + 10 * 1 + 3 = 10 += 5 + 10 + 3 = 28– Martin Parkin
yesterday
So you are effectively left with
10 += 5 + 10 * 1 + 3 = 10 += 5 + 10 + 3 = 28– Martin Parkin
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday
add a comment |
2 Answers
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v2-- / 5)= 1.4 and there is your problem. Integer division will never return a non integer value.
1/2 equals 0, not 0.5 and 7/5 equals 1, not 1.4.
answered yesterday
InBetween
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Martin: Step 1. is incorrect because both variables are integers the result will be an integer, (v2-- / 5) = 1. To get the answer of 1.4 one would need to change the variables to type double.
"So you are effectively left with 10 += 5 + 10 * 1 + 3= 28"
answered yesterday
9B44FD
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
v2-- / 5)= 1.4 and there is your problem. Integer division will never return a non integer value.
1/2 equals 0, not 0.5 and 7/5 equals 1, not 1.4.
answered yesterday
InBetween
24.1k33965
add a comment |
up vote
1
down vote
accepted
v2-- / 5)= 1.4 and there is your problem. Integer division will never return a non integer value.
1/2 equals 0, not 0.5 and 7/5 equals 1, not 1.4.
answered yesterday
InBetween
24.1k33965
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
v2-- / 5)= 1.4 and there is your problem. Integer division will never return a non integer value.
1/2 equals 0, not 0.5 and 7/5 equals 1, not 1.4.
answered yesterday
InBetween
24.1k33965
v2-- / 5)= 1.4 and there is your problem. Integer division will never return a non integer value.
1/2 equals 0, not 0.5 and 7/5 equals 1, not 1.4.
answered yesterday
InBetween
24.1k33965
edited yesterday
answered yesterday
InBetween
24.1k33965
answered yesterday
InBetween
24.1k33965
answered yesterday
InBetween
24.1k33965
24.1k33965
add a comment |
add a comment |
up vote
0
down vote
Martin: Step 1. is incorrect because both variables are integers the result will be an integer, (v2-- / 5) = 1. To get the answer of 1.4 one would need to change the variables to type double.
"So you are effectively left with 10 += 5 + 10 * 1 + 3= 28"
answered yesterday
9B44FD
32
New contributor
9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
0
down vote
Martin: Step 1. is incorrect because both variables are integers the result will be an integer, (v2-- / 5) = 1. To get the answer of 1.4 one would need to change the variables to type double.
"So you are effectively left with 10 += 5 + 10 * 1 + 3= 28"
answered yesterday
9B44FD
32
New contributor
9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
0
down vote
up vote
0
down vote
Martin: Step 1. is incorrect because both variables are integers the result will be an integer, (v2-- / 5) = 1. To get the answer of 1.4 one would need to change the variables to type double.
"So you are effectively left with 10 += 5 + 10 * 1 + 3= 28"
answered yesterday
9B44FD
32
New contributor
9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Martin: Step 1. is incorrect because both variables are integers the result will be an integer, (v2-- / 5) = 1. To get the answer of 1.4 one would need to change the variables to type double.
"So you are effectively left with 10 += 5 + 10 * 1 + 3= 28"
answered yesterday
9B44FD
32
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9B44FD is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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answered yesterday
9B44FD
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answered yesterday
9B44FD
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answered yesterday
9B44FD
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I have seen this, but I'm not sure where i'm going wrong. Isn't my logic correct in terms of that table? : msdn.microsoft.com/en-us/library/2bxt6kc4.aspx
– 9B44FD
yesterday
Your first assumption is incorrect.
?(v2-- / 5)= 1 not 1.4, because it will produce an integer result– Martin Parkin
yesterday
So you are effectively left with
10 += 5 + 10 * 1 + 3=10 += 5 + 10 + 3= 28– Martin Parkin
yesterday
Thanks Martin. Should have debbuged... X_X
– 9B44FD
yesterday