Compilare: user.cpp: In function ‘void CountingSort(unsigned int*, unsigned int*, unsigned int)’: user.cpp:11:82: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(unsigned int i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:11:82: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp: In function ‘void read(unsigned int&)’: user.cpp:22:25: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] while(inBuffer[pos] < 0x30 | inBuffer[pos] > 0x39) ^ user.cpp:31:25: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(inBuffer[pos] > 0x2F & inBuffer[pos] < 0x3A) ^ user.cpp: At global scope: user.cpp:46:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void itoa(unsigned int x) ^ user.cpp:5:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void CountingSort(unsigned int A[], unsigned int B[], unsigned int digit) ^ user.cpp: In function ‘int main()’: user.cpp:70:38: 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:71:40: 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); ^ user.cpp: In function ‘void read(unsigned int&)’: user.cpp:26:47: 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, 0x8000, stdin); ^ user.cpp:37:47: 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, 0x8000, stdin); ^ user.cpp: In function ‘void CountingSort(unsigned int*, unsigned int*, unsigned int)’: user.cpp:11:5: warning: iteration 255u invokes undefined behavior [-Waggressive-loop-optimizations] for(unsigned int i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^ user.cpp:11:33: note: containing loop for(unsigned int i = 0x0; i != 0x100; index[++i] = index[~-i] + frequence[~-i]); ^