Compilare: user.cpp: In function ‘int calcul(int, int, int)’: user.cpp:59:11: warning: variable ‘lat’ set but not used [-Wunused-but-set-variable] int cadr,lat; ^ user.cpp: In function ‘int main()’: user.cpp:73:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(A,"%d%d%d",&k,&x,&y); ^