rj.cpp: In function 'int main()': rj.cpp:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:17: 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:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:12: warning: 'ji' may be used uninitialized in this function rj.cpp:12: warning: 'jj' may be used uninitialized in this function rj.cpp:12: warning: 'ri' may be used uninitialized in this function rj.cpp:12: warning: 'rj' may be used uninitialized in this function