Compilare: user.cpp: In function ‘int main()’: user.cpp:44:10: warning: unused variable ‘c’ [-Wunused-variable] int n, c, l, r, m, p; ^ user.cpp:44:13: warning: unused variable ‘l’ [-Wunused-variable] int n, c, l, r, m, p; ^ user.cpp:44:16: warning: unused variable ‘r’ [-Wunused-variable] int n, c, l, r, m, p; ^ user.cpp:44:19: warning: unused variable ‘m’ [-Wunused-variable] int n, c, l, r, m, p; ^ user.cpp:46:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:48:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &v[i].x, &v[i].y); ^