nrpal.cpp: In function 'int main()': nrpal.cpp:37: warning: array subscript has type 'char' nrpal.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result nrpal.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result nrpal.cpp:30: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccel4SCn.o: In function `main': nrpal.cpp:(.text+0x1fb): warning: the `gets' function is dangerous and should not be used.