Mexarm / att-interview-task

AT&T interview task

• Armando Hernandez Marin

instructions

run the example

• docker is required to run the example

this shell script compiles main.c in a docker container and then executes: cat sip_tel_list.txt | printTNs

(printTNs is the compiled binary.)

./start-container.sh

compiler does not report warnings:

...
#8 [4/4] RUN gcc -Wall -o printTNs main.c
#8 sha256:34ea93ab6c54f002c42d91b46f3e72ab28f341a6f6edc08b68f0f2659a33499b
#8 DONE 0.4s
...

usage

./printTNs inputfile.txt
cat inputfile.txt | ./printTNs -
cat inputfile.txt | ./printTNs
./printTNs < inputfile.txt

example

./printTNs sip_tel_list.txt

output

TN: 18664190071                 TON: 0          NPI: 0
TN: 19736194383                 TON: 1          NPI: 1
TN: 16177503774                 TON: 1          NPI: 1
TN: 15618567581                 TON: 1          NPI: 1
TN: 18668322363                 TON: 2          NPI: 1
TN: 7736825791                  TON: 2          NPI: 1
TN: 9786597900                  TON: 2          NPI: 1
TN: 5212291533253               TON: 1          NPI: 1
TN: 7065268527                  TON: 2          NPI: 1
TN: 3733267                     TON: 3          NPI: 1
TN: 2674010405                  TON: 2          NPI: 1
TN: 9786597900                  TON: 2          NPI: 1
TN: 13478963834                 TON: 1          NPI: 1
TN: 13526169323                 TON: 1          NPI: 1
TN: 19736194383                 TON: 1          NPI: 1