Wave print column wise code not passing,whats wrong in this code?

#1

#include
using namespace std;
int main() {
int a[100][100],m,n;
cin>>m>>n;
for(int i=0;i<m;i++){
for(int j=0;j<n;j++)
cin>>a[i][j];
}
for(int j=0;j<m;j++){
if(j%2==0){
for(int i=0;i<m;i++)
cout<<a[i][j]<<", “;
}
else{
for(int i=m-1;i>=0;i–)
cout<<a[i][j]<<”, ";
}
}
cout<<“END”;
return 0;
}

#2

Change line 10 to for(int j=0;j<n;j++)