goldshakil
commented
4 years ago You code has 2 issues: 1) you function's return type should double pointer but your definition is integer pointer.
2) you are returning a local variable(answer array) which is destroyed once the function finishes executing. You have to use static double answer[4].
Please google static in c language for more information.
quilava1234
I have problems with the extra assignment on lecture 11 about the quadratic equation with pointers.
/Assignment calculate the root of quardratic equation ax^2 + bx + c using pointer to have multiple return values roots: x1 x2 real and imag part single function to calculate the roots function should return 4 value x1 R+i x2 R+i /
my code basically works like below:
int *getSol(int a, int b, int c) { double answer[4];
//~calculate the roots and shove them into array answer as elements
return answer;
}
int main{ double *ptr;
//~ get a, b, c input
ptr = getSol(a,b,c); //get answer array's starting address
printf("%f + %f i, %f + %f i", ptr, (ptr+1), (ptr+2), (ptr+3)); //print answers using their addresses
}
I thought by this way I'd get the starting address of the answer array assigned to ptr. Also, by printing the float numbers stored in address ptr, ptr+1, ptr+2, ptr+3 I expected to get my answers I got from my function getSol. But instead, I'm getting weird, big numbers that look like some addresses themselves printed. I wonder if you could help me out on what I'm missing/misunderstood or done wrong.