Compilare: main.cpp: In function 'int main()': main.cpp:40:13: warning: unused variable 'v1' [-Wunused-variable] int v1=modul(puncte[i].x,puncte[i-1].x); ^~ main.cpp:41:13: warning: unused variable 'v2' [-Wunused-variable] int v2=modul(puncte[i].y,puncte[i-1].y); ^~ main.cpp:31:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("copaci.in","r",stdin); ^ main.cpp:32:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("copaci.out","w",stdout); ^