bcast.cpp: In function 'int main()': bcast.cpp:11: warning: unused variable 'n' bcast.cpp:11: warning: unused variable 'x1' bcast.cpp:11: warning: unused variable 'y1' bcast.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result bcast.cpp:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result