Compilare: main.cpp: In function 'int main()': main.cpp:10:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&l,&c,&n,&nr); ^ main.cpp:16:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&dir); ^ main.cpp:6:29: warning: 'sf' may be used uninitialized in this function [-Wmaybe-uninitialized] { int l,c,nr,n,p,dir,inc,sf,i,j,aria,x,cl,cc; ^~ main.cpp:6:25: warning: 'inc' may be used uninitialized in this function [-Wmaybe-uninitialized] { int l,c,nr,n,p,dir,inc,sf,i,j,aria,x,cl,cc; ^~~