Background Reading: Understanding Different Types of Problems in Crypto.
This is the NOT the recommended standard.
There are serious security implications if not configured properly!

3DES Implementation

Concept: DO NOT roll your own Crypto! Use standard services and libraries.
It is NOT advisable in any circumstances to develop any sort of cryptography on your own. Instead , there are a few options for standard libraries that can be used. These libraries offer better stability as they are usually a product of several years of experience in implementing cryptography by an active development community who are dedicated towards efforts in implementation. It is therefore considered to be reliable and robust.

Examples: Openssl is one such library which popular and therefore is used as an example for this concept. OpenSSL is not the only available crypto library. For a list of different libraries and a comparision between them, visit here.

Find out which openssl version you are using:

Use the version option.
  
$ openssl version
OpenSSL 1.0.1e-fips 11 Feb 2013


You can get much more information with the version -a option.
  
$ openssl version -a
OpenSSL 1.0.1e-fips 11 Feb 2013
built on: Thu Jul 23 19:06:35 UTC 2015
platform: linux-x86_64
options:  bn(64,64) md2(int) rc4(16x,int) des(idx,cisc,16,int)
          idea(int) blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DKRB5_MIT -m64 -DL_ENDIAN -DTERMIO
-Wall -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic
-Wa,--noexecstack -DPURIFY -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT
-DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM
-DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM
-DWHIRLPOOL_ASM -DGHASH_ASM
OPENSSLDIR: "/etc/pki/tls"
engines:  rdrand dynamic
 


Please note that OpenSSL 1.0.2k has removed 3DES support. There are still ways you can re-enable 3DES (Re-enable 3DES), but considering the security implications, this should be done only if absolutely necessary.

Usage of Cryptography in Programming Languages

Concept: It is again advised to not roll out your own cryptography while developing software. There are popular libraries in almost all programming languages that can readily be used to perform cryptographic operations.

Examples:
C/C++:
There are multiple options for libraries that support 3DES in C/C++.

Using OpenSSL: http://www.firmcodes.com/triple-des-cbc-mode-encryption-example-c-programming-openssl/
Using Crypto++ Library: https://www.cryptopp.com/wiki/TripleDES