CinOneShotPart1.pdf

C in One Shot Part - 1 Flow - 1 1) Basic Printing, \n wali cheez, printing numbers also with + and -. 2) Variables, printing variables, int, float, and +,-,*,/ of integers. 3) Variables naming rules. 4) Comments 5) Taking Input 6) Modulus Operator 7) Float to int, int to float 8)...

C in One Shot Part - 1 Flow - 1 1) Basic Printing, \n wali cheez, printing numbers also with + and -. 2) Variables, printing variables, int, float, and +,-,*,/ of integers. 3) Variables naming rules. 4) Comments 5) Taking Input 6) Modulus Operator 7) Float to int, int to float 8) Hierarchy 9) Char and ASCII Basic program in C #include int main(){ printf(“hello world”); return 0; } How to move in next line? Example : printf(“Hello PW”); printf(“Hello CW”); Output will be : Hello PWHello CW Use of escape sequence ‘\n’ Example : printf(“Hello PW”); printf(“\n”); printf(“Hello CW”); Output will be : Hello PW Hello CW Use of escape sequence ‘\n’ Output Predict the output : f n n main(){ printf("nn\n\nnn\n"); n n printf("nn/n/nnn/n"); nn / n / / nnn n } # in.ua ,. n,. int main C) { return 0 ; 3 Variables and their Declaration Let us focus on int data type as of now. Variables Literals t 1) Variables as containers : ' In ' my ' < station > ' # include %d "n" ) int main / I printfl ; 4 ↳ text " ( Hello ) " printf ; pnintfl "%d " intro ; - ,n ); n =3; n = 5; printfl "%d " w ,n ) Printing Variables in C & Updation of Variables → int n " Output @ I int x = 5; n=S ; 5713-7 printf(“%d”,x); - x = 7; printf(“%d”,x); x = x + 6; printf(“%d”,x); x = x - 20; → n = 13-20 -7 printf(“%d”,x); n = Arithmetic operations on int data type ' ' ' ' + int x = 5; - % d int int y = 2; → 2f§- printf(“%d”,x+y); 5/2 = 2 printf(“%d”,x-y); printf(“%d”,x*y); int n = 4 ; n int 2 printf(“%d”,x/y); y = ; w int z = n+y ; y u :  5/2 2.5 ;] → × int n = 512 5/2 → 2 Increment - Decrement operators int x = 5; x/+; printf(“%d”,x); x/-; printf(“%d”,x); /+x; printf(“%d”,x); –-x; printf(“%d”,x); Float data type → Numbers Real God → int float x = 3.1; %f → float Arithmetic operations on float data type float x = 5; float y = 2; 512 2 → integer → printf(“%f”,x+y); → 7 float 2 = 5/2 ; printf(“%f”,x-y); 3 float 2 = 2 ; printf(“%f”,x*y); 10 5.0/2 → 2^5 printf(“%f”,x/y); 2. 5 512.0 → 2.5 float n ; 5 n= ; n  V 4-311-83 = /3 * * * ✓ = 4 3.14 r * r r int r = 5 ± 4*3.14*5 / * s 5 3 float v = ttw / c. w WAP to display area of circle with given -.. radius. Example : Calculating percentage of 5 subjects float x1 = 90; // x1 can be physics float x2 = 91; // x2 can be chemistry float x3 = 92; // x3 can be maths float x4 = 93; // x4 can be english float x5 = 94; // ohh wait comments ke baare me to bataya hi nahi xD float percent = (x1 + x2 + x3 + x4 + x5)/5; printf(“%f”,percent); // change the marks and run each time 4 where t.IN. Print percentage of Subjects marks are out of 40. Example : Calculating Area of a Circle Flow. float radius = 5; float r = s; float pi = 3.1415; int n int y int z float area = pi*radius*radius; , printf(“%f”,area); int a Variable Naming rules 1) Variables can start from an alphabet or underscore _. 2) Special characters except _ are not allowed. 3) Some particular keywords are not allowed. 4) Commas or blanks are not allowed. to Auto double int break extern enum unsigned while case sizeof for const static long continue float else signed do short switch char volatile default goto struct if union return void register typedef float Macbook ; int Mac ; Variable Naming rules - Examples Q. Which of the following are invalid variable names and why? BASICSALARY _basic basic-hra #MEAN group. 422 population in 2006 over time mindovermatter FLOAT hELLO queue. team’svictory Plot#3 2015_DDay Example : Calculating Simple Interest float p,r,t,si; ,R SI = P p = 100; r = 10; 1524601¥ 3% 30-4 t = 2; = si = (p*r*t)/100; printf(“%f”,si); Taking input // Let us take a simple example from User. int x; printf(”Enter a number\n”); scanf(“%d”,&x); // user will give ‘x’ a value. int y = x*x; printf(”square of number that you gave is %d”,y);  Run 10 circle 314 IS The area of is : - y DryRu pitta f radius µ The area of circle is : 314.1s pi area  Output : Enter Principal : 100 Enter Rate : 20 Enter Time : 3 60 simple interest is : Your " scanfl "%d , & a) ③ ④ principal rate time Si int n = 5; float y = 6.1 ; El y 4ns address of n int n scan fl "%d ; " , en ) ; µ Taking input // SUM of 2 given numbers Homeworld : int x; by output [ printf(”Enter first number\n”); "" " "" scanf(“%d”,&x); // user will give ‘x’ a value. En - - - int y; printf(”Enter second number\n”); scanf(“%d”,&y); // user will give ‘y’ a value. int sum = x+y; printf(”sum of the numbers that you gave is %d”,sum); au sum Taking Input Output ③ & "" ¥ """ Predict the output : " 30 40 main(){ 2 p 30 40 q= = int p,q; printf("Enter values of p and q"); scanf(" %d %d ",&p,&q); printf ("p = %d q =%d", p, q); }  ' Run ' Dry Example : Take two integers input, a and b : a>b, and find the remainder when a is divided by b. & print the remainder. main C) E int a , b ; 713% 7×5+4 39 pnintfl Enter 1st " " No ) = 3⑧. ; " f ( scan " %d , & a) ; 2ⁿᵈ No ) " pñntf / Enter ". ; " " & b) i int a = 39 ; scant ( Yod , int b = 7; int q % ; = int q = a / b; Hq = 5 int r = a - ( b*q ) ; Dinis or ✗ Quotient + Rem = Dividend return 0; Remainder Dividend - Divisor ✗ Quotient 3 = 8 = a - ( bxql 0b¥ : + , - , / , * % 3- = 0 , % MMr→ 38%8=6 r= a % b a=2 ; b = 6; y 813T ] [ 3% 2 2 % n = 2 n > www.tab-a [a < b) float to int and int to float : Ques : Take integer as input and print half of the number. a positive Ques : Take float input and print the fractional part of the real number. 123 2 (n] = - 1, 2, 3, 4, 5, 6 13.14" 0.14 & I. F. 15.7' = St0.7 0.7 -> (nT 22 = 7./ C2 ]= = = is line No. float a; out W - I scant ("%of", On); 07 int ; y = ch; W floats-as; a float bint W z Homework: - Code it yourself ~ Hierarchy of operators BOGMAS -> B,0,01M, Als int i = 2 * 3 / 4 + 4 / 4 + 8 - 2 + 5 / 8 ; A printf(“%d”,i); I' s ↳ I a MATHS 12 43) 1x 619: 1 = > PROG = (2x33K = 619= 105 * " bi's... 23 W Ch Cz" A, B','i,... ASCII values -> Important topic - good questions char ch = ‘a’; *65 ⑳ az # - 33 B b 98 ! 33 S -> 6 f = - c -> 67 c = 99 f f - 68 * · d = 100 E-69 - F - 7O G + 7 I 2 = 12] ⑧ - OU * - 42 = 90 I z - 3 36  * Else MCQ Time ! MCQ 1 character -> single digit a b"It' charch='a+; Which of the following is NOT a character constant (1) ‘Thank You’ WRONG (2) ‘Enter values of P, N, R’ (3) ‘23.56E-03’ I I - (4) All the above MCQ 2 In (b = 6.6 / a + 2 * n ;Iwhich operation will be performed first? (1) 6.6 / a - (2) a + 2 (3) 2 * n (4) Depends upon compiler MCQ 3 Which of the following statements is false - (1) Each new C instruction has to be written on a separate line (2) Usually all C statements are entered in small case letters (3) Blank spaces may be inserted between two words in a C statement (4) Blank spaces cannot be inserted within a variable name int n = 4; 22 = 1 + 7 ; MCQ 4 IfO a is an integer variable, a = 5 / 2 ; will return a value (1) 2.5 (2) 3 int a = 5/2; - (3) 2 (4) 0 MCQ 5 O,DM AS 3 The expression, a = 7 / 22 * ( 3.14 + 2 ) * 3 / 5 ; evaluates to G (1) 8.28 (2) 6.28 2 122 5.14 *3/S (3) 3.14 8 *S.14 *3/S - (4) 0 ⑧*3/S 8 IS ↳ 8 MCQ 6 int ↑ The expression, a = 30 * 1000 + 2768 ; evaluates to - (1) 32768 30000 + 2768 (2) -32768 a = 32768 (3) 113040 (4) 0 Short a 32768; = ↳ - 3276 8  G 2 2102 = Types * 1824 > 64 - Chhote dabba But vs Short = - r iut z = 3, d float y = 3.M; Charch: 'Al - mom 3ES7, 8 to short int short bytes 16 bits 2= -> -> -> long n = 32768; 8 Bits-I byte bits 2"numbers long long n - z = 16 bits + 2 numbers store b R6 Mb Gb Th d I6 v a v 2 = 85536 1000 1000 1000 1000  +32 bits int data type ->< bytes -> 232 numbers d long> 8 bytes -> 64 bits 23" numbers short -z' to 23-I int - 23 to 23-I long long - 263 to 23-I char ->< byte -> 8 bits - 28 numbers 256 numbers =  * BODMAS MCQ 7 ->% I, +, The expression x = 4 + 2 % - 8 evaluates to (1) -6 m => = 4 + 2 = 6 50 2 - (2) 6 2% 8= 2 ↳ 2 W (3) 4 2T5 (4) None of the above ↳ TE I 8 I 2 0-8 = 208 = 2 MCQ 8 What will be the value of d if d is a float after the operation d = 2 / 7.0? float d = 217.0 j (1) 0 stressin (2) 0.2857 (3) Cannot be determined - (4) None of the above ~ 4 O 3 o u