Applications Generation (OCR A Level Computer Science)

A programmer creates this function shown in Fig. 5 using a high-level language.

function mystery(x,y) 
  total = x + y 
  while x >= 10 then 
     x = x – 10 
     y = y – 10 
     total = total + x + y 
  endwhile 
  return total 
endfunction

Before the code in Fig. 5 can be executed, a translator must be used.

State the purpose of a translator.

When Imogen creates programs in a high-level language, she makes use of libraries.

Explain what is meant by a library, giving one example of when one may be used.

For each statement shown in Table 5, tick (✓) one box in each row to indicate which stage of compilation each action takes place at.

Table 5

Explain two differences between a compiler and an interpreter.