Compilare: user.cpp: In function ‘int main()’: user.cpp:123:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invsort.in", "r", stdin); ^ user.cpp:124:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invsort.out", "w", stdout); ^ user.cpp:125:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:126:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i<= n; ++i) scanf("%d", &v[i]); ^ user.cpp: In function ‘void rev(int, int)’: user.cpp:11:19: warning: ‘pos1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int mij = (dr - st + 1)>>1; ^ user.cpp:65:13: note: ‘pos1’ was declared here int pos1; ^ user.cpp:11:30: warning: ‘pos1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int mij = (dr - st + 1)>>1; ^ user.cpp:49:13: note: ‘pos1’ was declared here int pos1; ^ user.cpp:11:19: warning: ‘pos2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int mij = (dr - st + 1)>>1; ^ user.cpp:26:19: note: ‘pos2’ was declared here int pos1, pos2; ^ user.cpp:26:13: warning: ‘pos1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int pos1, pos2; ^ user.cpp: In function ‘void sortare(int, int)’: user.cpp:118:22: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] sortare(poz+1, dr); ^