Originally Posted by gh0pp3r
...but it is not declared.
Some languages support using variables without declaring them like BASIC, Python, etc (most of them being interpreted
languages rather than compiled
languages). However, others like C, C++ requires every variable to be declared before using them.
If you are using gcc
then use the option -Wall while compiling. This option will display all the errors.
gcc -Wall -pedantic myFile.c
Post your exact error messages, and part of source code in question for faster feedback from forum members.