Compilare: user.cpp: In function ‘double dist_2_puncte(int, int, int, int)’: user.cpp:33:12: warning: unused variable ‘c1’ [-Wunused-variable] double c1=(x1-x2)*(x1-x2); ^ user.cpp:34:12: warning: unused variable ‘c2’ [-Wunused-variable] double c2=(y1-y2)*(y1-y2); ^ user.cpp: In function ‘int main()’: user.cpp:59:20: warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘int’ [-Wformat=] printf("%f\n",0); ^ user.cpp:54:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.in","r",stdin); ^ user.cpp:55:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("desen.out","w",stdout); ^ user.cpp:57:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:58:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&punct[1].x1,&punct[1].y1); ^ user.cpp:64:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&punct[i].x1,&punct[i].y1); ^