c - Trouble with using calloc with an array and returning a pointer -

as reference second part of assignment:

int* generatefibonacci(int size);

this function take input integer called size. value contained in size variable represent how many numbers in fibonacci sequence put array. function use calloc create array of size , fill array size numbers fibonacci sequence, starting 1 , 1. when array complete function return pointer it.

my trouble come in play when error in line 8 "warning: assignment makes , integer pointer without cast". error in line 19 "warning: return makes pointer integer without cast".

so question is, how suppose set calloc make array size user, return pointer it?

#include <stdio.h> #include <stdlib.h>  int* generatefibonacci(int size) {   int i, array[size];    array[size]=(int*)calloc(size, sizeof(int));    array[0]=0;   array[1]=1;    for(i = 2; < size+1; i++)    array[i] = array[i-2] + array[i-1];    return *array; }  void printhistogram (int array[], int size) {   int i, j;    for(i=0; <= size; ++i)   {      for(j=0; j < array[i]; j++)     {       printf("*");     }     printf("\n");   } }     int main(void) {   int array[100], size;    printf("how big fibionacci number be? ");   scanf("%i", &size);    generatefibonacci(size);   printhistogram(array, size);    return 0; } 

how suppose set calloc make array size user, return pointer it?

for 1d array of int * use printf() , scanf()

int *array = {0}; size_t size = 0; printf("enter order of array"); scanf("%d", &size); array = malloc(size);//create memory space "size" elements if(array){//do other stuff} 

but unclear example, , comment if intend using 2d array....

as stated in comments, have created int array, attempted create memory it.

int i, array[size];    ...    array[size]=(int*)calloc(size, sizeof(int));//wrong 

as created, array not need memory. memory created on stack automatic.
if wanted 2d array of int. this:

int  *array[size]; //create pointer int []   

with this, can create array of arrays (in concept) in way:

for(i=0;i<size;i++) array[i]= calloc(size, sizeof(int));//do not cast output, not necessary   

now, have size x size 2d array of int. can assigned values in manner:

for(i=0;i<size;i++)     for(j=0;j<size;j++)         array[i][j]=i*j;//or more useful assignment 

by way, adjust parameters of calloc() statement needed, but note, casting output not necessary.

regarding return statement, function prototyped return int *.

int* generatefibonacci(int size){...} //requires return of int *   

if decide use 1d array, i.e. int *array={0} (requiring allocate memory), return:

return array;//array `int *`, return it. 

if using 2d array, return int *, must decide of size elements of array want return:

return array[i];//where `i` can index value, 0 size-1