Question

I am busy with a project where the following function needs to be implemented in C

void logic_circuit(int inputs[4],int outputs[2])

A counter needs to be created since all the 4 bit combinations needs to be inserted into this function…

void logic_circuit(int inputs[4],int outputs[2])
{
      //some calculations
      outputs[0] = ...
      outputs[1] = ...
}

//allocate memory
int inputs[4];
int outputs[2];

for(0000 to 1111)
{
     logic_circuit(0000,outputs);
}

I have been searching the web intensively but unfortunately I was’nt able to find anything usefull.Does anyone have an idea on how to tackle this issue?

Answer 1

Instead of four nested loops, you could also fill the inputs array from a single loop counter,

for(mask = 0; mask < 0x10; ++mask) {
    for(index = 0; index < 4; ++index) {
        inputs[index] = (mask >> index) & 1;
    }
    logic_circuit(inputs, output);
}

That scales better to larger inputs arrays.