View Compilation Error

0_0_4463411_21486.cpp: In function `int main()':
0_0_4463411_21486.cpp:32: error: `l' undeclared (first use this function)
0_0_4463411_21486.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4463411_21486.cpp:32: error: `r' undeclared (first use this function)