Compilare: main.cpp: In function 'void CountingSort(unsigned int, unsigned int*, unsigned int*, unsigned int)': main.cpp:10:49: warning: operation on 'i' may be undefined [-Wsequence-point] for(unsigned int i = 0x0; i != 0x7FF; index[++i] = index[~-i] + frequence[~-i]); ^~~ main.cpp:10:49: warning: operation on 'i' may be undefined [-Wsequence-point] main.cpp: At global scope: main.cpp:40:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void put_number(unsigned int x) ^~~~~~~~~~ main.cpp:15:45: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) unsigned int get_number() ^~~~~~~~~~ main.cpp:4:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void CountingSort(unsigned int N, unsigned int A[], unsigned int B[], unsigned int digit) ^~~~~~~~~~~~ main.cpp: In function 'unsigned int get_number()': main.cpp:23:23: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] ++p == 0x8000 && (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0); ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:23: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] ++p == 0x8000 && (fread(inBuffer, 0x1, 0x8000, stdin), p = 0x0); ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:38: 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); ^ main.cpp:63:40: 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); ^