程序崩溃

Question

Program -

Function that accepts current year and the birth year, computes the age

The problem -

Program crashes

The code-

int Age(int curr,  int birth)
{
if (curr > birth)
{
    return  1 + Age(curr--, birth);
}
return 0;
}

the input in function main is:

printf ("%d\n", Age(2014,1989)); 

Thanks for the help

Answer 1

It should be

... Age(--curr, birth);

as curr shall be decremented before Age() is being called.

Using curr-- decrements curr The decrement applied to curr by curr-- takes effect after Age() returned, which will never happen, as the programm runs into a stack overflow due to trying infinit recursion.

Answer 2

I guess this could be simply done as

age = curr-birth-1

without worrying about recursion.

Answer 3

In curr-- you are doing post decremented, decrements will affect in next line. so the value passed to function is always same as curr , You should do '--curr' so it will decrements curr value before calling of function.