[R] string to numeric question

[markleeds at verizon.net]

this seems l ike it shouldn't be that hard  but i give up.

if i have a string say, temp<-"01", I want to increase it by 1 so that 
it becomes "02". but the following code obviously won't work when the 
input string is say "10" because then it gives "011" when I just want 
"11".   uuugh.

does someone know an easy way ( i guess hard is fine too. beggars can't 
be choosy )  around that ?  the code below probably explains more
clearly  what i mean. thanks.

temp1 <- "01"
paste("0",as.numeric(temp1)+1,sep="")
temp10 <- "10"
paste("0",as.numeric(temp10)+1,sep="")