A program that, given a string, a width, and an empty string for ouput, centers the string in the ouput area.

The function is to return 1 if the formatting is successful and 0 if any errors, such as string length greater than width, are found. I'm getting errors though? What's wrong? I don't think I'm calling it right either...

#include <stdio.h>

int main()
{
    int dummy, value = 0;

    formatString(value);

    scanf_s("%d",&dummy);
    return 0;
}

int formatString (char *in, 
              char *out, 
              int   width)
{
//Local Declarations
int spaces;
char *start;
char *walker;
int value;

spaces = (width – 1) – strlen(in);
if (spaces < 0)
{
    value = 0;
}
else
{
    start = out + (spaces / 2);
    for (walker = out; walker < start; walker++)
       *walker = ' ';
    strcpy (start, in);

    for (walker = out + strlen(out); 
         walker < out + width – 2; 
         walker++)
       *walker = ' ';
    *walker = ‘\0’;
}
    return value;
}