Compilare: user.cpp: In function ‘void sorteaza()’: user.cpp:150:9: warning: unused variable ‘i’ [-Wunused-variable] int i , j; ^ user.cpp:150:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j; ^ user.cpp: In function ‘int main()’: user.cpp:105:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prefix2.in","r",stdin); ^ user.cpp:106:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prefix2.out","w",stdout); ^ user.cpp:108:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", sir + 1); n = strlen(sir + 1); ^