//
// Get next run number.
//

#include <stdio.h>
#include <stdlib.h>

void main (int argc, char *argv[])
{
    int n;
    int NextSequence (void);

    n = NextSequence();
    printf("set RUN=run%d\n", n);
    fprintf(stderr, "RUN=run%d\n", n);
}

//
// Get next run sequence number. This is found in the file \run.txt,
// which is created if not yet present.
//

int NextSequence (void)
{
    FILE *f;
    char *Path = "\\run.txt";
    long Value;

    f = fopen(Path, "r");
    if (f == NULL) {
        Value = 1;

    } else {
        fscanf(f, "%ld", &Value);
        fclose(f);
    }

    f = fopen(Path, "w");
    fprintf(f, "%ld", Value + 1);
    fclose(f);

    return Value;
}