Compilare: user.cpp: In function ‘int tabela(int, int, unsigned int)’: user.cpp:10:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=lat&&c<=lat) ^ user.cpp:10:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=lat&&c<=lat) ^ user.cpp:12:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>lat&&c>lat) ^ user.cpp:12:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>lat&&c>lat) ^ user.cpp:14:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>lat&&c<=lat) ^ user.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>lat&&c<=lat) ^ user.cpp:16:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=lat&&c>lat) ^ user.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=lat&&c>lat) ^ user.cpp:8:9: warning: unused variable ‘r’ [-Wunused-variable] int r=0; ^ user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:22:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tabela.in","r",stdin); ^ user.cpp:23:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tabela.out","w",stdout); ^ user.cpp:26:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^