Compilare: main.cpp: In function 'int main()': main.cpp:39:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pav.in","r",stdin); ^ main.cpp:40:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pav.out","w",stdout); ^ main.cpp:41:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &l, &c); ^ main.cpp: In function 'void pav(int, int, int, int, int)': main.cpp:27:9: warning: 'ig' may be used uninitialized in this function [-Wmaybe-uninitialized] if (i==ig) ^~