Compilare: user.cpp: In function ‘int main()’: user.cpp:21:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,s=0,q,w; ^ user.cpp:21:17: warning: unused variable ‘q’ [-Wunused-variable] int i,j,s=0,q,w; ^ user.cpp:21:19: warning: unused variable ‘w’ [-Wunused-variable] int i,j,s=0,q,w; ^ user.cpp:24:46: 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",&n,&it,&jt,&im,&jm); ^