rima.cpp: In function 'int main()': rima.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result rima.cpp:9: warning: 'a1' may be used uninitialized in this function rima.cpp:9: warning: 'a2' may be used uninitialized in this function rima.cpp:9: warning: 'a3' may be used uninitialized in this function rima.cpp:9: warning: 'a4' may be used uninitialized in this function rima.cpp:9: warning: 'elem' may be used uninitialized in this function