Compilare: user.cpp: In function ‘void read()’: user.cpp:43: warning: format ‘%d’ expects type ‘int*’, but argument 2 has type ‘char*’ user.cpp:45: warning: unused variable ‘j’ user.cpp:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void dp()’: user.cpp:51: warning: unused variable ‘cam’ user.cpp: In function ‘int main()’: user.cpp:94: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int rec(int, int, int, int)’: user.cpp:91: warning: control reaches end of non-void function