Compilare: user.cpp: In function ‘short unsigned int rand()’: user.cpp:11:15: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses] res = res ^ (1 << res) | 1; ^ user.cpp: In function ‘char nextch()’: user.cpp:40:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pbuff, 1, BMAX, stdin); } ^ user.cpp: In function ‘int main()’: user.cpp:97:38: 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:98:40: 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); ^