ratb.cpp: In function 'int main()': ratb.cpp:10: warning: unused variable 'x' ratb.cpp:10: warning: unused variable 'l' ratb.cpp:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ratb.cpp:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ratb.cpp:10: warning: 'li' may be used uninitialized in this function ratb.cpp:10: warning: 'lf' may be used uninitialized in this function