Main.cc: In function 'int main()':
Main.cc:6:12: error: expected ',' or ';' before ':' token
int c=3:
^
Main.cc:4:9: warning: unused variable 'a' [-Wunused-variable]
int a=1;
^
Main.cc:5:9: warning: unused variable 'b' [-Wunused-variable]
int b=2;
^
Main.cc:6:9: warning: unused variable 'c' [-Wunused-variable]
int c=3:
^