Thread: pointers exercise

Have to make a program that given an array of 7 integer from input, applies a function like this one:
void firstlasteven(int arr[], int dim, int* firstocc, int* lastocc);
that returns the position of the first and last even number or "-1" if there's none.
example input/output:

3 1 5
6
4
8
8
-8
1

This is my code so far:

Code:

#include <stdio.h>




int *primoultimopari(int arr[], int dim, int* primaocc, int* ultimaocc){
    int i;
    int s=0;
    for(i=0;i<dim;i++){
        if((arr[i]%2)==0){
            if(s==0){
                *primaocc=i;
                s++;
            }
            else{
                *ultimaocc=i;
            }
        }
    }
}


int main(void){
    int dimensione=7;
    int i;
    int A[7];
    for(i=0;i<7;i++){
        scanf("%d", &A[i]);
    }
    int prima,ultima;
    primoultimopari(A[7], dimensione, &prima, &ultima);
    printf("%d %d", prima,ultima);
    return 0;
}

(prima is first, ultima is last.)

Any help would be much appreciated.
These are the errors i get:

Code:

Lez6Es4c72.c:28:21: warning: passing argument 1 of ‘primoultimopari’ makes pointer from integer without a cast [-Wint-conversion]
     primoultimopari(A[7], dimensione, &prima, &ultima);

Lez6Es4c72.c:4:6: note: expected ‘int *’ but argument is of type ‘int’
 int *primoultimopari(int arr[], int dim, int* primaocc, int* ultimaocc){
      ^~~~~~~~~~~~~~~