Compilare: user.cpp: In function ‘int main()’: user.cpp:189:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.in","r", stdin); ^ user.cpp:190:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.out", "w", stdout); ^ user.cpp:194:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &D); ^ user.cpp:198:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].y); ^ user.cpp: In function ‘bool getType()’: user.cpp:171:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ user.cpp:172:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] while(c != 'F' && c != 'B') scanf("%c", &c); ^ user.cpp: In function ‘void bkt(int)’: user.cpp:116:12: warning: ‘b2’ may be used uninitialized in this function [-Wmaybe-uninitialized] x = 1.0*(b2 - b1)/(a1-a2); ^ user.cpp:80:24: note: ‘b2’ was declared here double a1, a2, b1, b2, x, y; ^ user.cpp:116:26: warning: ‘a2’ may be used uninitialized in this function [-Wmaybe-uninitialized] x = 1.0*(b2 - b1)/(a1-a2); ^ user.cpp:80:16: note: ‘a2’ was declared here double a1, a2, b1, b2, x, y; ^ user.cpp:117:18: warning: ‘b1’ may be used uninitialized in this function [-Wmaybe-uninitialized] y = x*a1 + b1; ^ user.cpp:80:20: note: ‘b1’ was declared here double a1, a2, b1, b2, x, y; ^ user.cpp:117:10: warning: ‘a1’ may be used uninitialized in this function [-Wmaybe-uninitialized] y = x*a1 + b1; ^ user.cpp:80:12: note: ‘a1’ was declared here double a1, a2, b1, b2, x, y; ^