Compilare: user.cpp: In function ‘int main()’: user.cpp:101:27: warning: unused variable ‘put’ [-Wunused-variable] long long put = x * coef[1] + y * coef[2]; ^ user.cpp:82:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &C); ^ user.cpp:84:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, maxn, fin); ^ user.cpp:85:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld%lld", &a, &b, &e); ^