Question

Here is a “snippet,” a few lines, taken from a C language program.

int a, b, c;

float d, e, f;

c = a + b;

d = e + f;

How many distinct opcodes will appear in the machine code compiled from this C snippet and why?

Answer 1

for different architecture the values are different.

2 for mov. From memory to cpu reg.

1 to add the cpu reg nd save result to Accumulator.

1 for store from cpu reg 'Accumulator' to memory .

4 for integer addition.

So there are 4  distinct opcodes will appear in the machine code compiled from this C snippet.

basically it also depends on architecture of machine for which you are compiling the program because if there Floating point register support  it will be more.