Compilare: main.cpp: In function 'int main()': main.cpp:85:9: warning: unused variable 'lst' [-Wunused-variable] int lst = 1; ^~~ main.cpp:66:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %lf",&n,&r); ^ main.cpp:69:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %lf",&x[i],&v[i]); ^