Compilare: main.cpp: In function 'int main()': main.cpp:19:11: warning: unused variable 'z' [-Wunused-variable] int n,z,k,zv,zt; ^ main.cpp:20:9: warning: unused variable 'fb' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^~ main.cpp:20:14: warning: unused variable 'j' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^ main.cpp:20:22: warning: unused variable 'st2' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^~~ main.cpp:20:26: warning: unused variable 'st1' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^~~ main.cpp:20:30: warning: unused variable 'sv2' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^~~ main.cpp:20:34: warning: unused variable 'sv1' [-Wunused-variable] int fb,i,j,nt,nv,st2,st1,sv2,sv1,sarcini; ^~~ main.cpp:22:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d",&n,&k,&zv,&zt); ^