Compilare: user.cpp: In function ‘int main()’: user.cpp:12:9: warning: unused variable ‘k1’ [-Wunused-variable] int k1,k2; ^ user.cpp:12:12: warning: unused variable ‘k2’ [-Wunused-variable] int k1,k2; ^ user.cpp:17:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=0; i<10; i++) fscanf(f,"%d",&a[i]); ^