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hi: I want to use recursion function to transform a integer from binary form to ascii form. But the result is wrong.I don't why ,please help to analyse.
soure code:
void binary_to_ascii(unsigned int value) { unsigned int quotient; quotient = value/10; if(quotient !=0 ) binary_to_ascii(quotient); putchar(value%10+'0'); } int main() { while(1){ binary_to_ascii(4267); } }
I want to produce characters '4','2','6','7' in sequence. but the result is '4','4','4'. I don't know what is wrong with my code.
Sorry - that post should have been titled, "use recursion for cases where it gives an advantage"
In other words: I agree that recursion may, in general, be used where it gives an advantage (within the limitations of the implementation) - but the example at hand is not one of them!
Yes, this is a case of a linear problem that is trivial to rewrite as a loop. And as i noted earlier, the only state info the loop will need is one character/iteration since the loop produces the characters in the reverse order.
Another alternative so instead produce the output in correct order is to have a sequence of operations handling 10^4, 10^3, 10^2, ...
The recursive solution requires the return address for n iterations, and an unknown number of state bytes/iteration that will depend completely on compiler and optimization level. And how will the compiler know the maximum recursion depth?