operatii1.cpp: In function 'int afis()': operatii1.cpp:132: warning: no return statement in function returning non-void operatii1.cpp: In function 'int main()': operatii1.cpp:205: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result operatii1.cpp:206: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result operatii1.cpp:208: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result operatii1.cpp:210: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result operatii1.cpp: In function 'int pr(int)': operatii1.cpp:68: warning: control reaches end of non-void function