Compilare: user.cpp: In function ‘int Numar(FILE*)’: user.cpp:76:17: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] char s[4]={NULL}; ^ user.cpp: In function ‘int main()’: user.cpp:127:20: warning: unused variable ‘sq’ [-Wunused-variable] int sq=*j; ^ user.cpp: In function ‘int Numar(FILE*)’: user.cpp:77:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%s",s); ^ user.cpp: In function ‘int main()’: user.cpp:91:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d ",&n,&m); ^