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Mathematical Statements and assignments
Within C we can directly load up the variable from within the program using the mathematical expression equates (=) e.g.
a= 'h'; Stores the character h in the variable A a=1; Stores the number 1 in the variable A b= 1.00E-10; Stores the number 1x10-10 in B c = 2.345; Stores the number 2.345 into c The assignment could be a self replacement type i.e. A=A+n; Adds n to the contents of the variable A and replaces the old value in A with the new one .The + operator is a mathematical operator which means add , likewise.
* means multiply / means divide - means subtract % (remainder of an integer division) ANSI C allows us to replace the simple formula A = A + n by a condensed version i.e A+=n; means A = A +n; e.g. a+=3.2 or a+=2; A-=n; means A = A-n; Likewise *=, /=, %= also exists. If the element to be subtracted/added is always one then we can use the increment operator (++) and decrement operator (--) i.e. ++A, A--, these can be pre operators and post operators (see loops) i.e. A+=1. Also parentheses (brackets) are used i.e. (). To supplement the C mathematical expressions scientific functions are available. We shall discuss these under the section concerned with functions. We can now construct simple programs using scanf, printf and mathematical functions.
Define Pure Virtual Function? Why & when it is used?
# include stdio.h> # include conio.h> # include string.h> void main() { int i=0,j=0; char a[100],temp; clrscr();
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Write a function that has int parameter n, makes another type of mask having n bit 1's from the left most bit and 32- n bit 0's next. The mask is called netmask in this seminar, an
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