OldSoft's KeyGenMe #2 -- Upgraded from DOS by wolverine2k

keygenme_2.c

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

#define NAME_LENGTH 50

//#define IS_KEYGEN 1

void generateSerial(char* p_buffer)
{
    int check1 = 0, check2 = 0;
    for(unsigned int i = 1; i <= strlen(p_buffer); i++) {
        check1 += p_buffer[i - 1] + i + 3;
    }
    check2 = (strlen(p_buffer) >> 1) * 3 + strlen(p_buffer);
    sprintf(p_buffer, "%d-%d", check2, check1);
    return;
}

int main(int argc, char** argv)
{
    char name[NAME_LENGTH];
    printf("OldSoft's KeyGenMe #2 -- Upgraded from DOS by wolverine2k\n");
    printf("Enter your name: ");
    scanf("%s", name);
#ifndef IS_KEYGEN
    char serial[NAME_LENGTH];
    printf("Enter a serial number: ");
    scanf("%s", serial);
#endif
    generateSerial(name);

#ifdef IS_KEYGEN
    printf("Serial Number: %s\n", name);
#else
    if(0 == strcmp(name, serial)) {
        printf("\nGood Job. You have cracked OldSoft's KeyGenMe #2\n");
    } else {
        printf("\nTry Again!\n");
    }
#endif
    system("pause");
    return 0;
}