erdos.cpp: In function 'int main()': erdos.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result erdos.cpp:17: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result erdos.cpp:11: warning: 'z' may be used uninitialized in this function erdos.cpp:12: warning: 'ok' may be used uninitialized in this function