va_list with multiple types

i want to write soemthing like this:
a function which will print various types of arguments.
I tried to work with va_list, it doesn't work.
int main(){
write("this ",1.2," is ",'a',7," test");
}
should result in:
this 1.2 is a7 test

http://www.boost.org/doc/libs/1_43_0/libs/assign/doc/index.html
It's a tragicomedy.
Maybe if they hadn't succumbed to Bjarne's corruption at a young age, they could have gone on to create some great TeX packages.