whenever I start programing,i.e. #include<stdio.h> and compile it. An error is shown and message is displayed as "unable to open the file stdio.h". Please help me to remove the error.

An error like that suggests a broken compiler installation. The way to fix it is often a re-install of the compiler. Which compiler are you using?

Or You may not have specified your Include directories.
for example
C:\TC\INCLUDE

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