Compilare: user.cpp: In function ‘void todown()’: user.cpp:11:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(st==0) ^ user.cpp: In function ‘void todown1()’: user.cpp:20:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(dr==0) ^ user.cpp: In function ‘int main()’: user.cpp:37:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piata.in","r",stdin); ^ user.cpp:38:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piata.out","w",stdout); ^ user.cpp:39:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d\n%d %d", &n, &xt, &yt, &xm, &ym); ^