Eroare de compilare: user.cpp: In function ‘void roy_floyd()’: user.cpp:14:20: error: ‘a’ was not declared in this scope if(a[i][k] and a[k][j] and (a[i][j] > a[i][k] + a[k][j] or !a[i][j]) and i!=j) a[i][j]=a[i][k]+a[k][j]; ^ user.cpp: In function ‘int main()’: user.cpp:24:9: error: ‘i’ was not declared in this scope for(i=1;i<=n;i++) ^ user.cpp:25:13: error: ‘j’ was not declared in this scope for(j=1;j<=n;j++) ^ user.cpp:30:9: error: ‘i’ was not declared in this scope for(i=1;i<=n;i++) ^ user.cpp:32:13: error: ‘j’ was not declared in this scope for(j=1;j<=n;j++) ^