rj.cpp: In function 'int main()': rj.cpp:17: warning: unused variable 'si' rj.cpp:17: warning: unused variable 'sp' rj.cpp:19: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:17: warning: 'r1' may be used uninitialized in this function rj.cpp:17: warning: 'r2' may be used uninitialized in this function rj.cpp:17: warning: 'j1' may be used uninitialized in this function rj.cpp:17: warning: 'j2' may be used uninitialized in this function