agenda.cpp: In function 'int main()': agenda.cpp:50: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result agenda.cpp:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result agenda.cpp:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result agenda.cpp: In function 'int verif(char*)': agenda.cpp:45: warning: control reaches end of non-void function agenda.cpp: In function 'int main()': agenda.cpp:49: warning: 'st' may be used uninitialized in this function agenda.cpp:49: warning: 'dr' may be used uninitialized in this function /tmp/cc3gYvsg.o: In function `main': agenda.cpp:(.text+0x20d): warning: the `gets' function is dangerous and should not be used.