alo.cpp: In function 'int main()': alo.cpp:11: warning: unused variable 'a' alo.cpp:11: warning: unused variable 'j' alo.cpp:11: warning: unused variable 'p' alo.cpp:11: warning: unused variable 's' alo.cpp:11: warning: unused variable 'z' alo.cpp:13: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result alo.cpp:18: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result