Compilare: user.cpp: In function ‘int main()’: user.cpp:8:17: warning: unused variable ‘nr’ [-Wunused-variable] int i,n,t=0,nr=0,j=0,max=0,nr2=0; ^ user.cpp:8:22: warning: unused variable ‘j’ [-Wunused-variable] int i,n,t=0,nr=0,j=0,max=0,nr2=0; ^ user.cpp:8:32: warning: unused variable ‘nr2’ [-Wunused-variable] int i,n,t=0,nr=0,j=0,max=0,nr2=0; ^ user.cpp:12:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&n); ^ user.cpp:15:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^