Compilare: user.cpp: In function ‘int ver()’: user.cpp:21:9: warning: unused variable ‘v’ [-Wunused-variable] int v=1; ^ user.cpp: In function ‘void citire()’: user.cpp:45:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:46:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(str,2,in); ^ user.cpp:48:32: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(str+1,100,in); ^