Main.cc: In function 'int main()':
Main.cc:8:18: warning: the address of 'a' will always evaluate as 'true' [-Waddress]
if(a[i]<'0'||&&a[i]>'9'){
^
Main.cc:8:19: error: expected ')' before '[' token
if(a[i]<'0'||&&a[i]>'9'){
^
Main.cc:8:18: error: label 'a' used but not defined
if(a[i]<'0'||&&a[i]>'9'){
^