Compilare: main.cpp: In function 'void readLines()': main.cpp:128:74: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%lf", &v[i].A.x, &v[i].A.y, &v[i].B.x, &v[i].B.y); ^ main.cpp: In function 'void findInters()': main.cpp:140:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &ls1, &ls2, &lf1, &lf2); ^ main.cpp: In function 'int main()': main.cpp:207:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^