on allowing "int a" definition everywhere

got some thought today thet simply probably allowing
to define "int a" everywhere could be just simply a good
c (or other language) design decision
there are here places when its not allowed like
if(int a==2) {} or
foo(1,2,int a); or f= a*int b*c
and soem must write
int a;
if(a==2) {} or
int a;
foo(1,2,a);
int b;
f= a*b*c
but is probably pointles to disallow that it simply
probably should be allowed..
some could say that local variables need initialisation
but no problem to also write initialisation imo
if((int a=2)==2)
it may look weird but this ewirdness is side thing
(not part of this idea) and the idea is imo most probably
right