Softwareharish

  //operators in C programming language //Operators: a symbol used to perform operations in given programming language //Types of operators in C language     /*1. Arithmetic Operators       2. Relational Operators       3. Logical Operators       4. Bitwise Operators       5. Logical Operators     */ //--------------------------------------- //Arithmetic Operators     /*(+): addition       (-): subtraction       (*): multiplication       (/): division       (%): modulus - gives remainder       */ //--------------------------------------- //Relational Operators     /*(==): is equal to       (!=): is not equal to       (>): greater than       (<): less than       (>=): greater than or equal to       (<=): less  than or eq...

//variables in C //variable: A name given to a memory location is called variable //declaring variable: type variable_name; //rules for defining a variable in C     /*1. can contain alphabets, digits and underscore(_)       2. a variable name can start with an alphabet and underscore only       3. can't start with a digit       4. whie space and reserved words are not allowed to give name of a variable       */ //Data types in C     /*1. basic data type: int, char, float, double       2. derived data type: this type of data types are created or derived by using basic data types                             array, pointers, structure, union       3. enumeration data type: emum       4. void data type: void     */ #include <stdio.h> int main () {     printf ( " %lu " , s...

//basic syntax of a C program // a C program is made up of the collection of tokens // Token: smallest unit used in a C program is called token #include <stdio.h> int main () {     int     a // token (identifier)     ;     a     = // token (operator)     100 ;     printf     (           "softwareharaish" //token (string literal)     )     ; //token (symbol)     return //token (keyword)     0 //token (constant)     ; } // in the above c program I breaks the program into individual tokens // types of tokens i C program     /*  1. keywords: reserved words which has a special meaning in c program ()         2. identifiers: name of functions, variables ets to identifie                         (panctuators are not allowed to make id...

//steps taken by a compiler to execute a C program /*  1. pre processing: i) comments removal                        ii) macros expansion                        iii) #files inclusion                        iv) conditional compilation     2. compilation: converts to assembly level instructions     3. assembling: converts to machine level instructions     4. linking: linker combine all machine level instructions                 to create an executable file that is .exe file*/ //to understand better how compiler works follow the below step /* A) execute "gcc -Wall -save-temps file_name.c" on vs code terminal     u will get 4 extra files in explorer this files will show u how compiler works         1. file_name...

#there are two types of command line arguments are there #1. positional arguments #- we can give value arguments directly in WPS (windows powershell) #- cant skip any value argument #- expected command in WPS for command line argument program execution ( 4 6 add [note:cant change position]) #2. optional arguments #- we have to give value arguments in WPS with (--argument_name argument_value) #- we can skip any value argument #- expected command in WPS for program execution (--number1 4 --number2 6 --operation add [note:can change position]) import argparse #python built in library import sys if __name__== '__main__' : parser=argparse.ArgumentParser() #parser object # 1. positional arguments # using add_argument function or attribute adding arguments '''parser.add_argument("num1", help="first number") parser.add_argument("num2", help="second number") parser.add_argument(...

# '==' : value equality-two objects have the same value # is : reference equality- two references refer to the same object a=[ 1 , 2 , 3 ] b=a #two references refer to the same object(b is not the copy of a) print (b==a) print (b is a) c=a[:] #two references refer to the two different object(now c is the copy of a) print (c==a) print (c is a)

#raise is a built-in keyword used to raise exception # visit all built-in Exceptions and understand name= input ( "enter u r name:" ) if name.isnumeric(): raise Exception ( "numbers r not allowed" ) #here we used raise keyword

// typedef is a keyword which is used to give name to the existing data type // syntax- typedef <previous_name> <alias_name>; #include <stdio.h> int main () {     typedef int nt ; // here i given a new name to the data type int to 'nt'     nt a ;           // now i can use 'nt' in place of int     // it is not neccesary to use alias name or new name i can use previous name also like u can see below     int b ;     //--------------------     // using typedef with structure     typedef struct library     {         char name [ 20 ];         int pages ;         char author [ 20 ];     } lib ;             // here i given a new name to the data type library(structure) to 'lib'     lib book1 , book2 ; // here now i can use 'lib' instead of 'struct libra...

//structures are user defined data types in c //in structures we can store any type of data types like int floate char etc //declaring a structure #include <stdio.h> #include <string.h> struct library //here strut is a keyword for creating a structure, here library also called structure tag {     char name [ 20 ]; //members or elements of library tag or structure name     int pages ;     char author [ 20 ]; //character array or string of size 20, we have to use string for a char value //there are two methods to initialize a variable from structure }; //book1; //method 1 int main () {     struct library book1 , book2 ; //method 2     //there are two ways to assign values to the variables     //struct library book1={'h',2,'s'}; //way 1,but this is an error, like this we can only assign int values not char     strcpy ( book1 . name , "softwareharish" ); //way 2     book1 . pages = 100 ; ...

#from pywin32 module we can make read the sentences by the computer from win32com.client import Dispatch speak=Dispatch( "sapi.spvoice" ) speak.speak( "harish is a champion in coding " ) #in function def speak (str): from win32com.client import Dispatch speak = Dispatch( "sapi.spvoice" ) speak.speak(str) if __name__== '__main__' : speak( "jai ntr" )

#include <stdio.h> #include <string.h> //string functions library int main () {     char s1 [] = "harish" ; //string1     char s2 [] = "shiva" ; //string2     char s3 [ 10 ];     //puts(strcat(s1,s2)); //concatenation     printf ( "length of s1: %d \n " , strlen ( s2 )); //give length of string     printf ( "the reversed string of s1: " );     puts ( strrev ( s1 )); //reverse the string     //s3=strcat(s1,s2); //you canot do like this     strcpy ( s3 , strcat ( s1 , s2 )); //copy value in another variable     printf ( "s3 copied from s1 and s2:" );     puts ( s3 );     return 0 ; }

#include <stdio.h> char printstar ( int rows ); int main () {     int n , row , j ;     char star = '*' ;     printf ( "enter 1 for triangle star \n 0 for reverse triangle star \n " );     printf ( "enter:" );     scanf ( " %d " ,& n );     if ( n == 0 )     {         printf ( "enter no of rows u want:" );         scanf ( " %d " ,& row );         for ( j = row ; j >= 1 ; j --)         {             printstar ( j );         }     }     else if ( n == 1 )     {         printf ( "enter no of rows u want:" );         scanf ( " %d " ,& row );         for ( j = 1 ; j <= row ; j ++)         {             printstar ( j ); ...

#include <stdio.h> int recursive ( int n ); int iterative ( int n ); int main () {     int n , fib1 , fib2 ;     printf ( "enter no of which u want fibbonachi:" );     scanf ( " %d " ,& n );     fib1 = recursive ( n );     fib2 = iterative ( n );     printf ( "recursive fibonachi is %d \n " , fib1 );     printf ( "iterative fibonachi is %d " , fib2 );     return 0 ; } int recursive ( int n ) {     if ( n == 1 || n == 2 )     {         return n - 1 ;     }     else     {         return recursive ( n - 1 )+ recursive ( n - 2 );     } } int iterative ( int n ) {     int a = 0 , b = 1 ;     for ( int i = 0 ; i < n - 1 ; i ++)     {         b = a + b ;         a = b - a ;     }     return a ; }

// 1kg = 2.205 pounds // 1km = o.621 mile // 1 foot = 12 inch // 1 meter = 3.280 foot // 1 inch = 2.54 cm #include <stdio.h> int main () {     char input ;     float quantity , result ;     float kgtopound = 2.205 ;     float kmtomile = 0.621 ;     float foottoinch = 12 ;     float mtofoot = 3.280 ;     float inchtocm = 2.54 ;     while ( 1 )         {             printf ( "enter q to quiet \n    1.kg to pound \n    2.km to mile \n    3.foot to inch \n    4.m to foot \n    5.inch to cm \n " );             scanf ( " %c " ,& input );             switch ( input )             {                 case 'q' :                 p...

#include <stdio.h> void arr_rev ( int arr [] ) //reversing array user built function {     for ( int i = 0 ; i < 5 / 2 ; i ++)     {         //swaping method         int temp ;         temp = arr [ i ];         arr [ i ]= arr [ 4 - i ];         arr [ 4 - i ]= temp ;     } } int main () {     int arr [] ={ 1 , 2 , 3 , 4 , 5 };     for ( int j = 0 ; j < 5 ; j ++)     {         printf ( "element of %d is %d \n " , j , arr [ j ]);     }     printf ( "reversed array \n " );     arr_rev ( arr );     for ( int j = 0 ; j < 5 ; j ++)     {         printf ( "element of %d is %d \n " , j , arr [ j ]);     }     return 0 ; }

d1={ } #dictionary print ( type (d1)) d2={ "name" : "n harish" , "aim" : "softwareharish" , "gf" : "single king" , "salary" : 10000 } print (d2) print (d2[ "name" ]) d2[ "nick name" ]= "shiva" #adding another key value pair print (d2) del d2[ "gf" ] #delete key value pair print (d2) #some functions of dictionary d3=d2.copy() #copy the dictionary print (d3) print (d2.get( "aim" )) # access key value pair d2.update({ "propery" : "laptop" }) #update dictionary print (d2) print (d2.keys()) #give all keys of dictionary print (d2.items()) #give all items of dictionary

  Above everything will be used in re module that is  1. metacharacters 2. Special sequences 3. Sets

import pickle '''#pickling a python object friends=["vijay","shankar","raju"] file="friends.pkl" #define a pickle file fileobj=open(file,"wb") #pickle file object in write binary(wb) mode pickle.dump(friends,fileobj) #dump method is used to add content to the pickle file fileobj.close() #we cannot read simply pickle file in text format because it is of binary format''' #reading a pickle file fileobj= open ( "friends.pkl" , "rb" ) myfriends=pickle.load(fileobj) #load method is used to read a pickle file print (myfriends) fileobj.close()

#json (java script object notation) is a standardized format commonly used to transfer data as text #from web application to server and vice versa. #json is a built in module in python import json #loads method used to convert json format to python jsonstr= '{"name":"harish","goal":"engineer","channel":"softwareharish"}' #json string parse=json.loads(jsonstr) #convert json string to python print (parse[ "goal" ]) print (parse) #dumps method used to convert python to json format dic1={ "name" : "harish" , "goal" : "engineer" , "channel" : "softwareharish" , "subscribers" : 1000 , "watchtime" : 2000 , "israj" : False } x=json.dumps(dic1) #convert python to json string print ( "json string \n " , x)

//different methods to take a string from user #include <stdio.h> int main () {     char str1 [ 10 ];     printf ( "enter a string:" );     gets ( str1 ); //method 1: using gets function     printf ( " %s \n " , str1 );     char str2 [ 10 ];     printf ( "enter a string:" );     scanf ( " %s " ,& str2 ); //method 2:using scanf, but with this we cannot use white spaces in string     printf ( " %s \n " , str2 );     printf ( "using puts displaying string output \n " );     puts ( str2 ); //puts function is used to display string output     return 0 ; }