Compilare: user.cpp: In function ‘int main()’: user.cpp:44:30: warning: format ‘%lg’ expects argument of type ‘double’, but argument 3 has type ‘long double’ [-Wformat=] fprintf(g,"%lg",a[n][k]/r); ^ user.cpp:12:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:14:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%f",&b[i]); ^