This problem occurs due to wrong configuration in Turbo C++ directories.
Please follow the steps to fix the problem
Step 1. Go in Options menu.
Step 2. Then in Directories...
Step 3. Edit the directories show in following images
Include Directories -> C:\TURBOC3\INCLUDE
Library Directories -> C:\TURBOC3\LIB
Output Directory -> C:\TURBOC3\SOURCE
Source Directories -> C:\TURBOC3\SOURCE [Wrong in image]
Step 4. Click on OK button
Done. Problem Solve.