ec.cpp: In function 'int main()': ec.cpp:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ec.cpp:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ec.cpp:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result ec.cpp:27: warning: 'a' may be used uninitialized in this function ec.cpp:27: warning: 'b' may be used uninitialized in this function ec.cpp:27: warning: 'c' may be used uninitialized in this function