Compilare: main.cpp: In function 'void fil(int, int)': main.cpp:21:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(viz[i][j+1]==0 && (drum[i][j]>=0 && drum[i][j]<=3) || (drum[i][j]>=8 && drum[i][j]<=11)) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:29:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("zona.in", "r",stdin); ^ main.cpp:30:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zona.out", "w",stdout); ^ main.cpp:32:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &x, &y, &n, &l); ^ main.cpp:35:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &d); ^