Compilare: main.cpp: In function 'int main()': main.cpp:35:40: 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:36:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "algsort.out", "w", stdin ); ^ main.cpp:41:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &n ); ^ main.cpp:43:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &V[ i ] ); ^ main.cpp: In function 'void quick_sort(int*, int, int)': main.cpp:9:5: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow] if ( st >= dr ) return ; ^~