Compilare: user.cpp: In function ‘int main()’: user.cpp:103:9: warning: unused variable ‘b’ [-Wunused-variable] int b,v; ^ user.cpp:103:11: warning: unused variable ‘v’ [-Wunused-variable] int b,v; ^ user.cpp:104:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d",&m,&n,&t); ^ user.cpp:111:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d %d %d", &x1, &y1, &x2, &y2, &cul); ^