Compilare: user.cpp: In function ‘void CountingSort(u32*, u32*, u32)’: user.cpp:15:73: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:15:73: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp: In function ‘void read(u32&)’: user.cpp:28:23: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] while(inBuffer[p] < 0x30 | inBuffer[p] > 0x39) ^ user.cpp:33:23: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(inBuffer[p] > 0x2F & inBuffer[p] < 0x3A) ^ user.cpp: In function ‘i32 main()’: user.cpp:143:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i32 i = 0x1; i != N; ++i) ^ user.cpp:154:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i32 i = 1; i != N; ++i) ^ user.cpp:165:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i32 i = 0x1; i != N; ++i) ^ user.cpp: At global scope: user.cpp:43:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void itoa(u32 x) ^ user.cpp:20:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void read(u32 &number) ^ user.cpp:9:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void CountingSort(u32 A[], u32 B[], u32 digit) ^ user.cpp: In function ‘void read(u32&)’: user.cpp:26:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(inBuffer, 0x1, 0x40, stdin); ^ user.cpp: In function ‘i32 main()’: user.cpp:128:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:129:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out", "w", stdout); ^ user.cpp: In function ‘void CountingSort(u32*, u32*, u32)’: user.cpp:15:5: warning: iteration 255u invokes undefined behavior [-Waggressive-loop-optimizations] for(u32 i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:15:24: note: containing loop for(u32 i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^