rj.cpp: In function 'int main()': rj.cpp:15: 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:19: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rj.cpp:13: warning: 'r1' may be used uninitialized in this function rj.cpp:13: warning: 'r2' may be used uninitialized in this function rj.cpp:13: warning: 'j1' may be used uninitialized in this function rj.cpp:13: warning: 'j2' may be used uninitialized in this function rj.cpp:81: warning: 'min' may be used uninitialized in this function rj.cpp:81: warning: 'lm' may be used uninitialized in this function rj.cpp:81: warning: 'cm' may be used uninitialized in this function