Compilare: user.cpp: In function ‘char nextch()’: user.cpp:19:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:67:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("valentin.in", "r", stdin); ^ user.cpp:68:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("valentin.out", "w", stdout); ^ user.cpp:131:28: warning: ‘cse’ may be used uninitialized in this function [-Wmaybe-uninitialized] cse*= 2; } ^ user.cpp:117:33: warning: ‘cso’ may be used uninitialized in this function [-Wmaybe-uninitialized] cso = 2 * cso + 1; ^