Using the C++ Math Library

Translating from MATLAB to C++

Differences Between C++ and MATLAB

Most MATLAB expressions translate into C++ with no effort -- very often the MATLAB and C++ are identical. There are some differences in syntax, of course, but it is important to realize that the C++ interface is substantially the same as the M-file interface.

MATLAB and C++ syntax are identical in the following four areas:

• Simple function calls that have one output and one or more inputs
• Arithmetic expressions consisting entirely of matrix operations (+, *, /, -)
• Array indexing expressions that don't use the colon operator, cell array indexing, or structure indexing
• Assignment statements, including assignment with a standard indexing expression on the left-hand side

The differences between C++ and MATLAB are discussed in detail below. More space is devoted to differences than similarities, not because there are more differences, but because the differences are more likely to cause confusion.

Programming in C++ differs from programming in MATLAB in five important areas:

• Syntax
• Variable Declaration
• Function Calling Conventions
• Control Structure
• Logical Values
• Name Conflicts with Standard C Library Functions
• Example Program: Rewriting roots.m in C++ (ex8.cpp)

Example - Using load() and save() (ex7.cpp)

Syntax