Open a file and output numbers

#include
#include
void accessFile();
int main()
{
    accessFile();
    return 0;
}
void accessFile()
{
    FILE *fp;
    int n = 0;
    int z = 0;
    fp = fopen(“count.txt”,”a+”);
    if(fp == NULL)
        printf(“Error opening file”);
    else
        {
            while(!feof(fp))
            {
                fscanf(fp, “%d”, &z);
                n++;
            }
        }
    fprintf(fp,”%dn”,n-1);
}
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