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Compilation error

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Compilation error refers to a state when a compiler fails to compile a piece of computer program source code, either due to errors from the compiler itself, or more likely syntax errors in the code. A compilation error message often helps programmers debugging the source code for possible syntax errors.

Examples

Common C++ compilation errors

  • Undeclared identifier, e.g.:

doy.cpp: In function `int main()': doy.cpp:25: `DayOfYear' undeclared (first use this function)[1]

This means that the variable "DayOfYear" is trying to be used before being declared.

  • Common function undeclared, e.g.:

xyz.cpp: In function `int main()': xyz.cpp:6: `cout' undeclared (first use this function)[1]

This means that the programmer most likely forgot to include iostream.h.

  • Parse error, e.g.:

somefile.cpp:24: parse error before `something'[2]

This could mean that a semi-colon is missing at the end of a statement.

  1. ^ a b "Common C++ Compiler and Linker Errors".
  2. ^ "Compiler, Linker and Run-Time Errors".