Compilare: user.cpp: In function ‘int main()’: user.cpp:36:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:39:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a[i][j]); ^ user.cpp:25:38: warning: ‘ymax’ may be used uninitialized in this function [-Wmaybe-uninitialized] i=x+dlin[++dir];j=y+dcol[dir]; ^ user.cpp:35:28: note: ‘ymax’ was declared here int n,maxim=0,val,xmax,ymax; ^ user.cpp:25:24: warning: ‘xmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] i=x+dlin[++dir];j=y+dcol[dir]; ^ user.cpp:35:23: note: ‘xmax’ was declared here int n,maxim=0,val,xmax,ymax; ^