Compilare: user.cpp: In function ‘int main()’: user.cpp:10:31: warning: unused variable ‘y’ [-Wunused-variable] int k,val2=0,prod,nr0=0,x,y,s=0,n,m; ^ user.cpp:11:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:14:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (j=1; j<=m; j++)fscanf(f,"%d",&ma[i][j]); ^ user.cpp:15:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&k); ^ user.cpp:19:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d%d",&sx,&sy,&jx,&jy,&val); ^ user.cpp:126:9: warning: ‘cerut’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(nr0>=cerut) v[++s2]=i; ^