Compilare: main.cpp: In function 'int main()': main.cpp:9:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&x,&y,&n,&nr); ^ main.cpp:14:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&dir); ^ main.cpp:8:36: warning: 'sf' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,x,y,l,c,nr,i,j,p,dir,inc,sf,s=0; ^~ main.cpp:8:32: warning: 'inc' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,x,y,l,c,nr,i,j,p,dir,inc,sf,s=0; ^~~