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Comparing digits in an array

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innovationhut

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Hi,

I am currently writing a program in which I have to compare the value received from a pin (values read from the pin and stored in variable) with the numbers stored in an array.

For example:

Code: 
const char com3[] = {0x0C, 0x0A, 0x0A, 0x0C}; // now compare them with the four variables. D0, D1, D2 and D3

D0 = 0C, D1 = 0X0A, D2 = 0X0A, D3 = 0X0C   //so that if they are all equal it should set PORTC high.

what kind of loop I can use to compare them, all variables and data stored should be equal to set PORTC HIGH, such that D0 should be equal to 0C, D1 to 0A and so on.
 

innovationhut said:
so that if they are all equal it should set PORTC high.
Click to expand...
Well, this is probably the only sentence in your post that completely makes sense. It sounds like you want to compare 2 arrays with known equal length.

If that's all you need to do, than the algorithm is fairly simple. You will need a variable to act as a temporary flag. Before you enter a loop, set a flag to true. If the i-th elements are equal, set the flag to true. If they are not equal, set the flag to false and break out of the loop. After the loop check the flag. If it remains true after the loop is complete, then set PORTC high.
 
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