Given two strings str1 and str2, write code to find out if all non-unique elements in str2 are in str1?

#include<iostream>
#include<string.h>
using namespace std;
int main(){

char str1[]=”hello worlda”;
char str2[]=”lets all woraak”;
int s1[256]={0},s2[256]={0};
int flag=1;
int i=0,j=0;
while(str1[i]!=”){

s1[str1[i]]++;
i++;
}
while(str2[j]!=”){
s2[str2[j]]++;
j++;
}
j=0;
while(str2[j]!=”){

if(s2[str2[j]]>1){

if(s1[str2[j]]!=0){
j++;

continue;

}
else{

flag=0;

break;
}
}
j++;
}
if(flag==1)
cout<<“yes”;
else
cout<<“no”;
}