Compilare: user.cpp: In function ‘void quick(int, int, int)’: user.cpp:14:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(m[i]<x) ^ user.cpp:19:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(m[i]>x) ^ user.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(m[i]==x) ^ user.cpp: In function ‘int main()’: user.cpp:46:27: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 2 has type ‘long unsigned int*’ [-Wformat=] scanf("%u ", &m[i]); ^ user.cpp:49:27: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long unsigned int’ [-Wformat=] printf("%u ", m[i]); ^ user.cpp:41:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.in", "r", stdin); ^ user.cpp:42:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.out", "w", stdout); ^ user.cpp:43:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ user.cpp:46:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u ", &m[i]); ^