At some point, we might say, “Is there a better way?”Ĭ source code is run through a preprocessor before compilation. It is common to see many, many lines of initializers for large arrays. The statement here is equivalent to the one above. In general, C does not care if a statement contains white space or is continued on another line. Newline and carriage return are used to indicate the end of a line in C source code. The set of white space characters include blank (or space), tab, newline, carriage return, vertical tab, and form feed. In this case, the white space is “blanks” or spaces. Initializers must be separated with commas. ![]() It is an error to have more initializers than the size of the array. If there are fewer initializers than the size of the array, the extra elements are set to 0. ![]() If the size of the array is not specified inside the brackets, the size will be the number of initializers. The values within the curly braces are called “initializers”. All the examples use standard C and worked with this compiler.Īn array can be initialized with values when it is “declared”. The compiler used for the examples is GCC for ARM with a 32-bit microcontroller as the target. Examples also show how to control putting arrays in RAM or non-volatile memory and selecting which data files to use for initialization. ![]() One dimensional and multi-dimensional arrays are considered. The files are read when the program is compiled. The data is not stored in the source files. This article shows how to initialize arrays in a C program with values from text files.
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