passwordchecker

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

#define SIZE 10

int main()
{
    char *pass1=(char*)malloc(SIZE);
    char *pass2=(char*)malloc(SIZE);
    int n1=0,n2=0,m=0,count=0,i=0,j=0;
    memset(pass1,0,SIZE);
    memset(pass2,0,SIZE);
    printf("Size:%d\n",strlen(pass1));
    printf("Enter old password\n");
    scanf("%s",pass1);
    n1=strlen(pass1);
    printf("\nLength:%d\n",n1);
    if(pass1[n1]== '\0')
        printf("YES\n");
  
    printf("you entered:%s\n",pass1);
    printf("Enter new pass:\n");
    scanf("%s",pass2);
    n2=strlen(pass2);
   printf("you entered new:%s\n",pass2);
    printf("Count->%d\n",count);
    while (pass1[i]!='\0')
    {
        printf("Entered while\n");
        if(pass1[i]==pass2[j])
        {
            printf("equal:i:%d:j:%d\n",i,j);
            i++;
            j++;
        }
        else
        {
            count++;
            i++;
            j++;
            printf("c:%d\n",count);
        }
        

        if( pass2[j] =='\0')
        {
            printf("Breaking c:%d\n",count);
            break;
        }

        
    }
    if(pass2[j]=='\0' && pass1[i]!='\0')
    {
        count+=n1-i;
    }
    else if(pass2[j]!='\0' && pass1[i]=='\0')
    {
        count+=n2-j;
    }
    printf("count:%d\n",count);

    return 0;
}