vb.net barcode reader from webcam THE ROBOTBASIC LANGUAGE in Software

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THE ROBOTBASIC LANGUAGE
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RobotBASIC allows you to have arrays of any dimension with as many elements in each dimension as you want. The dimension of the array is the number of indexes it has. For example Array_1[5,7,8] is a three-dimensional array while Array_2[4,6,7,8] is fourdimensional. The dimensional constraints of an array are the extent of each dimension. For example Array_3[5,7] is a two-dimensional array with constraints of ve rows and seven elements in each row (or 7 columns). Remember that even though we have ve rows, the fth row is row number four since the rst row is row number zero. Once an array is de ned, each element in the array can be used as if it were a simple variable. Anywhere a simple variable can be used an array element can be used. And just like a simple variable, the array element needs to be assigned a value before it is used.
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NOTE: In commands that require a variable to be passed, so it can be assigned a value, you cannot substitute an array element; you must use a simple variable. The simple variable can be later stored in the array element if needed.
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Some commands and functions in RobotBASIC act on an entire array at once. These commands require the array name as a parameter. An array is created by using the Dim command or the Data command. See Sec. C.7 for details on these commands. Here are examples of array manipulations:
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Dim Array1[3,4] Array1[1,1] = testing Array1[0,0] = 9 Array1[0,1] = 8.4 Print Array1[1,1];Array1[0,0] Array1[2,2] = Array1[0,0]+Array1[0,1]*4
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B.7.5 OPERATORS Expressions are formulas that manipulate expressions. Expressions are manipulated using operators. Some operators have precedence over other operators. For example multiplication has precedence over addition. So if you write 4 5*3 the result is 19 not 27. That is because the numbers 5 and 3 are multiplied rst then the 4 is added. If you wanted to do the addition rst you must write (4 5)*3 which will result in 27. There are ve types of operators (listed in order of precedence):
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The following list of operators is in the order of their precedence
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Parenthesis ( ) Any expression surrounded by parenthesis will be evaluated before it is passed on for further evaluation outside the parenthesis. Thus, parenthesis are used to trump any operator precedence rules (see above). You can think of any combination of expressions within the parenthesis as an expression in itself just as if it were a single number or string.
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APPENDICES
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Use parenthesis around operations when you are not sure how they would evaluate due to operator precedence, or to make the intent of the formula clear, or to override operator precedence. Examples:
Print 3*4+5 //prints 17 Print 3*(4+5) //prints 27
Math Operator (listed in order of precedence) Unary Negate ( ) Put in front of a numeric expression makes the result a negative if it is positive and positive if it is negative. For example:
a = 5 print a //print 5 print -(a-7) //prints 2
Raise to the Power (Exponentiation, ^) another (the exponent). For example:
Print Print Print Print Print Print 4^2+1 4^(2+1) (3+1)^(2+1) 4^-2.0 4^-2 4.0^-2
Raises an expression to the power by
//prints //prints //prints //prints //prints //prints
17 64 64 0.0625 0 0.0625
Divide (/), Multiply (*), Percentage (%), Modulus (#)
/ divides a number expression by another. * multiplies a number expression by another. % calculates the percentage of a number expression. # calculates the integer remainder after dividing an integer expression by another.
In all the above operations, if either expression is not a number an error will occur. All these operators have the same precedence and will be evaluated from left to right if they are in sequence. When you divide two integers you will get the result of an integer division not a oatingpoint division so 2/3 is 0 not 0.6666. If you want to make sure the result is a oatingpoint number make sure that at least one of the expressions is a oating-point number: 2.0/3 results in 0.666 Modulus is an integer operation only. If any of the expressions is a oat it will be truncated to an integer. The percentage operation will yield a oat result always. Examples:
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