Compilare: user.cpp: In function ‘int main()’: user.cpp:8:27: warning: unused variable ‘b’ [-Wunused-variable] int i,j,v,n,a[50][50],b[50][50],c[50],fag,ok; ^ user.cpp:8:37: warning: unused variable ‘c’ [-Wunused-variable] int i,j,v,n,a[50][50],b[50][50],c[50],fag,ok; ^ user.cpp:8:47: warning: unused variable ‘ok’ [-Wunused-variable] int i,j,v,n,a[50][50],b[50][50],c[50],fag,ok; ^ user.cpp:25:18: warning: ‘fag’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<fag; ^