Compilare: user.cpp: In function ‘int verif(int)’: user.cpp:10:9: warning: unused variable ‘S’ [-Wunused-variable] int S = 0, X, Y; ^ user.cpp: In function ‘int main()’: user.cpp:52:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&L); ^ user.cpp:54:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d", &a[i], &b[i]); ^