C-ProInsights

  #include <stdio.h> #define PI 3.142 int main()  { float distance_rectangular, distance_semi_circles, total_distance; float  length_rectangular = 67.0;  float  breadth_rectangular = 21.0;  distance_rectangular = 2 * length_rectangular ; distance_semi_circles = 2 * PI * (breadth_rectangular/2); total_distance = distance_rectangular +distance_semi_circles; /* Display the total distance*/ printf( "The distance of the running track is %.2f meters\n" , total_distance); return 0; }

#include <stdio.h> int main() { float inches, centimeters; /*Input length in inches from the user*/      printf( "Enter length in inches: " );      scanf( "%f" , &inches); /*Convert inches to centimeters*/      centimeters = inches * 2.54; /* Display the result */      printf( "%.2f inches is equal to %.3f centimeters\n" , inches, centimeters); return 0; }

#include <stdio.h> int main() { char name[50], gender; float height, weight, bmi; /* Input data from user */      printf( "Enter name: " );      scanf( "%s" , name);      printf( "Enter height in meters: " );      scanf( "%f" , &height);      printf( "Enter weight in kilograms: " );      scanf( "%f" , &weight);      printf( "Enter gender (M/F): " );      scanf( " %c" , &gender);  /* Calculate BMI*/      bmi = weight / (height * height); /* Display the result*/      printf( "\n%s's BMI: %.2f\n" , name, bmi); return 0; }

#include <stdio.h> int main()  {      float unit_price = 10.50;      int num_items = 5;      float cost; /* Calculate the cost*/      cost = unit_price * num_items; /* Display the result*/      printf( "The cost of %d items is %.2f Rupees\n" , num_items, cost); return 0; }

#include <stdio.h> int main() { float x, y; /* Given value of x*/      x = 5.23; /*Calculate y using the equation y = 3.5x + 5*/      y = 3.5 * x + 5; /*Display the result*/      printf( "When x = %.2f, the value of y is %.2f\n" , x, y); return 0; }

#include <stdio.h> int main() { float celsius, fahrenheit; /* Input temperature in Celsius from the user*/      printf( "Enter temperature in Celsius: " );      scanf( "%f" , &celsius); /* Convert Celsius to Fahrenheit*/      fahrenheit = celsius * 1.8 + 32; /* Display the temperature in Fahrenheit*/      printf( "%.2f Celsius is equal to %.2f Fahrenheit\n" , celsius, fahrenheit); return 0; }

#include <stdio.h> int main() { float subject1, subject2, subject3, subject4, average;      /* Input marks of each subject from the user*/      printf( "Enter marks of subject 1: " );      scanf( "%f" , &subject1);      printf( "Enter marks of subject 2: " );      scanf( "%f" , &subject2);      printf( "Enter marks of subject 3: " );      scanf( "%f" , &subject3);      printf( "Enter marks of subject 4: " );      scanf( "%f" , &subject4); /* Calculate average marks*/      average = (subject1 + subject2 + subject3 + subject4) / 4; /* Display the average marks*/      printf( "The average marks of the four subjects is: %.2f\n" , average); return 0; }

#include <stdio.h> #define PI 3.14159 int main()  { float radius, height, volume; /* Input radius and height from the user*/      printf( "Enter the radius of the cylinder: " );      scanf( "%f" , &radius);      printf( "Enter the height of the cylinder: " );      scanf( "%f" , &height); /* Calculate volume*/      volume = PI * radius * radius * height; /* Display the volume*/      printf( "The volume of the cylinder is: %.2f cubic units\n" , volume); return 0; }

#include <stdio.h> int main() {      double meters, centimeters;      /* Input length in meters*/      printf( "Enter length in meters: " );      scanf( "%lf" , &meters);      /* Convert meters to centimeters*/      centimeters = meters * 100;      /* Display the result*/      printf( "%.2f meters is equal to %.2f centimeters.\n" , meters, centimeters); return 0; }

#include <stdio.h> int main ( void ) { char c, d; c = 'd'; d = c; printf ( "d = %c\n" , d); return 0; }

123.456                     0996 0x10.5                     -12E-12 0X0G1                     07777 0001                          1234uL 0xFFFF                   1.2Fe-7 123L                           15,000 0Xab05                   1.234L 0L -597.25              197u 123.5e2                   1 00U .0001                        0XABCDEFL +12                            0xabcu 98.6F                        +123 98.7U 17777s

1. Int char 6_05 2. Calloc Xx alpha_beta_routine 3. floating _1312 z 4. ReInitialize _ A$

#include <stdio.h> int main (void) {       int answer, result;     answer = 100;     result = answer - 10;     printf ( "The result is %i\n" , result + 5); return 0; }

#include <stdio.h> int main (Void) ( INT sum; /* COMPUTE RESULT sum = 25 + 37 – 19 /* DISPLAY RESULTS // printf ( "The answer is %i\n" sum); return 0; }

#include <stdio.h> int main(void) { int sum; /* COMPUTE RESULT */ sum = 87 - 15; /* DISPLAY RESULTS */ printf ( "The answer is %i \n" , sum); return 0; }

#include <stdio.h> int main (void) {      printf ( "Testing..." );      printf ( "....1" );      printf ( "...2" );      printf ( "..3" );      printf ( "\n" ); return 0; } OUTPUT => Testing.......1...2..3 This C program defines a main() function that sequentially prints out the strings "Testing...", "....1", "...2", and "..3" each on a separate line using the printf() function. It concludes with a newline character. The program then returns 0, indicating successful execution to the operating system.

i) * * * * * * * * * * * * * * * * * * * * * #include <stdio.h> int main( void ) { int row,column; for (row=1;row<=6;row++) { for( column=1;column<=row;column++) { printf( "*" ); } printf( "\n" ); } return 0; } This C program prints a pattern resembling a right triangle with asterisks, where the number of asterisks in each row increases from 1 in the first row to 6 in the last row. It achieves this using nested loops: the outer loop controls the number of rows, and the inner loop determines the number of asterisks to print in each row. After printing the required number of asterisks in each row, a newline character is printed to move to the next row. Thus, the result is a right triangle pattern made of asterisks.

#include <stdio.h> int main ( void ) { printf ( "* In C, lowercase letters are significant. \n" ); printf ( "* main is where program execution begins.\n" ); printf ( "* Opening and closing braces enclose program statements in a routine.\n" ); printf ( "* All program statements must be terminated by a semicolon.\n" ); return 0; }

A variable is a symbolic name that refers to a location in memory where data is stored. It can be used for various purposes and its value can be changed. It is a way of using symbols to identify memory locations so that they can be accessed and manipulated more conveniently. Type variable_list; The example of declaring the variable is given below:int a; float b; char c; Here a, b, c are variables. The int, float, char are the data types. Alternatively, we can assign values to the variables when we declare them, as shown below: int a=10,b=20;//declaring 2 variable of integer type float f=20.8; char c='A'; Rules for defining variables A variable is a name that can consist of letters, numbers, and underscores.  A variable name must begin with a letter or an underscore, not a number.  A variable name cannot contain any spaces.  A variable name cannot be the same as any of the reserved words or keywords in the programming language, such as int, float, etc.

In C language, input and output operations are performed by the functions printf() and scanf(), which are built-in library functions defined in the header file stdio.h.

Before starting the abcd of C language, you need to learn how to write, compile and run the first c program. To write the first c program, open the C console and write the following code: #include <stdio.h> :-includes the standard input output library functions. The printf() function is defined in stdio.h . int main() :-The main() function is the entry point of every program in c language. printf() :-The printf() function is used to print data on the console. return 0 :-The return 0 statement, returns execution status to the OS. The 0 value is used for successful execution and 1 for unsuccessful execution. You will see the following output on user screen.

   What is a compilation?        C is a programming language that converts source code into object code or machine code. The conversion process has four steps: Pre-processing, Compiling, Assembling, and Linking.      The preprocessor eliminates all the comments from the source code and carries out the preprocessor directives. For instance, it substitutes the directive <stdio.h> with the contents of the 'stdio.h' file.       The following are the phases through which our program passes before being transformed into an executable form:         Preprocessor         Compiler         Assembler         Linker Preprocessor A source code file is a text file that contains instructions written in the C programming language. The file name has a ".c" extension to indicate its format. Before compiling the source code, a preprocessor analyzes and modifies it according to certain directives. The preprocessor then passes the expanded code to the compiler, which translates it in

Dennis Ritchie C programming is considered as the base for other programming languages, that is why it is known as mother language . Because most compilers, JVMs, kernels, etc. are written in C, and because most programming languages (such C++, Java, C#, etc.) adopt C syntax, C language is regarded as the mother tongue of all current programming languages. It offers the fundamental ideas used in numerous languages, including C++, Java, C#, and others, such as the array, strings, functions, file management, etc. C programming language  was developed in 1972 by  Dennis Ritchie  at bell laboratories of AT&T (American Telephone & Telegraph), located in the U.S.A. It was developed to overcome the problems of previous languages such as B, BCPL, etc. Initially, C language was developed to be used in UNIX operating system. It inherits many features of previous languages such as B and BCPL. Let's see the programming languages that were developed before C language. Lan