apel.cpp: In function 'int f_eval(int)': apel.cpp:39: warning: unused variable 'sg' apel.cpp:39: warning: unused variable 'x' apel.cpp: In function 'int main()': apel.cpp:65: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[300]' apel.cpp:66: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[300]' apel.cpp:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result apel.cpp:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result apel.cpp:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result