Compilare: user.cpp: In function ‘int main()’: user.cpp:144:13: warning: unused variable ‘s’ [-Wunused-variable] int s = back[sum]; ^ user.cpp:103:23: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FIN("triunghi.in"); ^ user.cpp:104:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FOUT("triunghi.out"); ^