bifo.cpp: In function 'int add(int, int, int)': bifo.cpp:15: warning: no return statement in function returning non-void bifo.cpp: In function 'int scad(int*, int*)': bifo.cpp:29: warning: no return statement in function returning non-void bifo.cpp: In function 'int add2(int*, int*)': bifo.cpp:40: warning: no return statement in function returning non-void bifo.cpp: In function 'int main()': bifo.cpp:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result bifo.cpp:59: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result bifo.cpp:61: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result bifo.cpp:62: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result bifo.cpp:83: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result bifo.cpp:86: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result