How To Make A Password Generator In C++

i am new to c++ and this is a interesting thing ok now this is a preview of my code

ok now heres the code


#include<iostream> #include<stdlib.h> #include<time.h> #include<string.h> using namespace std; int main() { int length,x,str,j=0,answ; char pass[255],s[255], alphan[]="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", alph[]="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", num[]="0123456789"; cout<<"Choose the password characters: \n1-Alphanumerics (a-z,A-Z,0-9) \n2-Only letters \n3-Only numbers \n4-Manually inserted characters\nMode:";cin>>answ; if(answ==4) { cout<<"Enter the characters desired WITHOUT SPACE: ";cin>>s; str=strlen(s); } cout<<"Password length=";cin>>length; srand(time(NULL)); switch(answ) { case 1:{while(length--) { x=rand()%62; pass[j++]=alphan[x]; } } break; case 2:{while(length--) { x=rand()%52; pass[j++]=alph[x]; } } break; case 3:{while(length--) { x=rand()%10; pass[j++]=num[x]; } } break; case 4:{while(length--) { x=rand()%str; pass[j++]=s[x]; } } break; } cout<<"Password: "; for(int i=0;i<j;i++) cout<<pass[i]; return 0; }

preview -

done