Compilare: user.cpp: In function ‘int main()’: user.cpp:9:9: warning: variable ‘mat’ set but not used [-Wunused-but-set-variable] int mat[50][50],i=1,j=1,n,c,k,a,p; ^ user.cpp:9:35: warning: unused variable ‘a’ [-Wunused-variable] int mat[50][50],i=1,j=1,n,c,k,a,p; ^ user.cpp:9:37: warning: unused variable ‘p’ [-Wunused-variable] int mat[50][50],i=1,j=1,n,c,k,a,p; ^