Compilare: user.cpp: In function ‘int main()’: user.cpp:202:10: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:204:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &task, &N, &K); ^ user.cpp:206:125: 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 %d", &tr[i].p[0].x, &tr[i].p[0].y, &tr[i].p[1].x, &tr[i].p[1].y, &tr[i].p[2].x, &tr[i].p[2].y); ^ user.cpp:212:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.out", "w", stdout); ^