What are curtailment bars on an r.c.c. slab ?
`` How does this code work : #include <stdio.h> main -LRB- -RRB- -LCB- int r , c , sum ; for -LRB- r = 1 ; r < = 3 ; r = c -RRB- -LCB- for -LRB- c = 1 ; c < = 2 ; c = r -RRB- -LCB- sum = r + c ; printf -LRB- '' `` r = % d c = % d sum = % d \ n '' '' , r , c , sum -RRB- ; -RCB- printf -LRB- '' '' % d \ n '' '' , c -RRB- ; -RCB- -RCB- ? Why does it work ? ''