Martuza's blog

Change the value 0 to 1 or 1 to 0 of a flag variable
By Martuza, 13 years ago, In English

Sometimes we use flag variables for indicating some operations. and we need to change the value of flag 0 to 1 or 1 to 0. we use this statements 

bool flag = 1;
if(flag == 1) flag = 0;
else flag = 1;

But how I get same result not using these statements? Have any mathematical calculation for this ? Please anyone help me.

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13 years ago, hide # |
 
Vote: I like it +16 Vote: I do not like it 
bool new_flag = !flag;

int new_flag = 1 - flag;
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13 years ago, hide # |
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Vote: I like it +14 Vote: I do not like it 
bool flag = 1;
flag ^= 1

^ xor operation.

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13 years ago, hide # |
 
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bool flag = true;
flag = !flag;
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13 years ago, hide # |
 
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flag ^= 1;

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