Compilare: user.cpp: In function ‘int main()’: user.cpp:34:21: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] fscanf(f,"%d",&n); ^ user.cpp:36:40: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long long int*’ [-Wformat=] fscanf(f,"%d %d",&v[i][0],&v[i][1]); ^ user.cpp:36:40: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘long long int*’ [-Wformat=] user.cpp:46:21: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(g,"%d",k); ^ user.cpp:34:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:36:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&v[i][0],&v[i][1]); ^ user.cpp:42:28: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (v[i][1]<ref) { k++; } ^