Compilare: user.cpp: In function ‘int main()’: user.cpp:15:19: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int n,p,a,b,i,ok=0,j; ^ user.cpp:17:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d\n",&p,&n); ^ user.cpp:34:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^