multiplu.cpp: In function 'int main()': multiplu.cpp:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result multiplu.cpp:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result multiplu.cpp:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result multiplu.cpp:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result multiplu.cpp:8: warning: 'a' may be used uninitialized in this function multiplu.cpp:8: warning: 'c' may be used uninitialized in this function multiplu.cpp:8: warning: 'b' may be used uninitialized in this function