Password Test (fork & pipe)

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

//link soal : https://www.dropbox.com/s/m6oztmzpuvy6m8e/O1-T0316-WM01-05.pdf?dl=0

int main(){
    pid_t pFork;
    int pi[2];
    char pass[100];
    int huruf,angka,ascii,i,pStrength;
    if(pipe(pi)<0)
        printf("Pipe ERROR");
    pFork=fork();
    if(pFork<0)
        printf("Error");
    else if(pFork==0){
        printf("Child Process\n===========\n");
        do{
            printf("Masukan Password[5-20]: ");
            scanf("%s",pass);getchar();
        }while(strlen(pass)>20||strlen(pass)<5);
        close(pi[0]);
        write(pi[1],&pass,sizeof(pass));
        sleep(1);
    }
    else if(pFork>0){
        close(pi[1]);
        read(pi[0],&pass,sizeof(pass));
        printf("Parent Process\n===========\n");
        printf("Your Password is \"%s \" \n",pass);
        huruf=0;
        angka=0;
        ascii=0;
        for(i=0;i<strlen(pass);i++){
            if(isalpha(pass[i]))
                huruf++;
            else if(isdigit(pass[i]))
                angka++;
            else
                ascii++;
        }
        printf("Jumlah Huruf : %d\n",huruf);
        printf("Jumlah Angka : %d\n",angka);
        printf("Jumlah ASCII : %d\n",ascii);
        printf("Panjang Pswd : %ld\n",strlen(pass));
        pStrength=0;
        if(strlen(pass)>=5&&strlen(pass)<=13)
            pStrength++;
        else if(strlen(pass)>13)
            pStrength+=2;
        if(huruf>=2&&huruf<=3)
            pStrength++;
        else if(huruf>3)
            pStrength+=2;
        if(angka>=2&&angka<=3)
            pStrength++;
        else if(angka>3)
            pStrength+=2;
        if(ascii>=2&&ascii<=3)
            pStrength++;
        else if(ascii>3)
            pStrength+=2;
        if(pStrength<4)
            printf("Password Lemah\n");
        else if(pStrength<=6)
            printf("Password Normal\n");
        else
            printf("Password Kuat\n");

    }
}