Apparition d'un smiley

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


int main(int argc, char *argv[])
{


    char tab[]="                   azertyuiopqsdfghjklmwxcvbnAZERTYUIOPQSDFGHJKLMWXCVBN0123456789_$&#@";//86
    char password[] = "souris";
	char login4[4];
	
    float sum  = 1;
	float checksum = 3696619;
	
    int i[7];
    int j;
    

    int index1,index2;
    char sub;
    char *fin = NULL;
    int ok = 0;
    int vara;
   
/**************************** 4 ***********************************/
        for(i[0]=0;i[0]<86;i[0]++)
        {
            login4[0] = tab[i[0]];
			for(i[1]=0;i[1]<86;i[1]++)
			{
				login4[1] = tab[i[1]];
				for(i[2]=0;i[2]<86;i[2]++)
				{
					login4[2] = tab[i[2]];
					for(i[3]=0;i[3]<86;i[3]++)
					{
						login4[3] = tab[i[3]];
						printf("\n%s",login4);
						for (j=0;j<6;j++)
						{
							//Index1
		
							if (j>1)
								index1 =  10;
							else
							{
								sub = login4[j];
								fin = strchr(tab,sub);
								index1 = 96 - strlen(fin);
							}
		
							// Index2
					
							sub = password[j];
							fin = strchr(tab,sub);
							index2 = 96 - strlen(fin);
							//Somme
				
							sum = sum+(index1*6*(j+1))*(index2*(j+1)*(j+1));
		
						}
						printf(" %lf ",sum);
		
						if (sum == checksum)
						{
							i[0] = 86;
							i[1] = 86;
							j = 6;
							printf("\n\n\n%s est bon",login4);
							ok = 1;
						}
					}
				}
			}
        }
    if(!ok)
    printf("\n\n Echec") ;
	return 0;
}