Compilare: user.cpp: In function ‘int fill(int, int)’: user.cpp:21:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:30:32: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘bool*’ [-Wformat=] scanf("%d",&m[i][j]); ^ user.cpp:26:18: warning: unused variable ‘k’ [-Wunused-variable] int nn,mm,kk,k,x,y; ^