yantox_ska@yahoo.com data types session 2. yantox_ska@yahoo.com primitive data types int, float,...

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Data Types

Session 2

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Primitive data types int, float, double, char

Aggregate data types Arrays come under this category Arrays can contain collection of int or float or char

or double dataUser defined data types

Structures and enum fall under this category.

Data types in C

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Simple Data Type int integer bil. bulat float floating point bil. pecahan char character hanya 1 digit char[pj] string lebih dari 1 digit

How to declare int jml_anak; float nilai_mhs,rata2; char sex,status; char nm_mhs[20],almt[35];

How to Declare

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Variables are data that will keep on changingDeclaration

<<Data type>> <<variable name>>;int a;

Definition<<varname>>=<<value>>;a=10;

Usage<<varname>>a=a+1; //increments the value of a by 1

Variables

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Should not be a reserved word like int etc..Should start with a letter or an underscore(_)Can contain letters, numbers or underscore. No other special characters are allowed

including spaceVariable names are case sensitive

A and a are different.

Variable names- Rules

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Variable Name for a memory object. Variable names must start with letters and contain letters, digits, and underscores. • a, b, i, j, counter, number_of_points, c1234, …

Type What the variable represents. Could be of integer, floating point number, character, string, and many others.• int, float, double, char, …

Declaration Tells compiler about variables and their type. • int i,j;• float sum;

Variables

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It’s NOT a string anymore.It is seemed as a series of characters, which is

a character array.The number of the character array is just the

same as the number of letters of the word or sentence plus one.

The one more element is “\0” which is printed as “\n” by gets and printed as “”(NULL) by other words.

What’s string in turbo C

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Numeric Types

int integer

float floating point

char charater (a very shot integer)

short or short int short integer

long or long int long integer

double long floating point

long double very long floating point

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Reading Inputs

1. #include <stdio.h>2. #include<conio.h>3. void main()4. { float bil1,bil2,hasil; //deklarasi variabel5. clrscr(); //membersihkan layar 6. printf("Please input the first number : "); scanf("%f",&bil1);7. printf("Please input the second number: "); scanf("%f",&bil2);8. hasil = bil1 * bil2; //proses9. printf(“bil1 * bil2 = %f\n“,hasil); //cetak hasil kali10. getch(); //berhenti sebentar sampai ditekan tombol11.}

printf(“Hasil Kali dari %f dengan %f adalah %f “,bil1,bil2,hasil);

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Assignment

1. /* Arithmetic operators */2. #include <stdio.h>3. #include<conio.h>4. void main()5. {6. int a,c;7. int b=4;8. a=3;9. c=a+b;10. printf(“Sum: %d + %d -> %d\n”,a,b,c);11. a++;b--;12. prinf(“Now a=%d and b=%d\n”,a,b);13.}

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Write a program to calculate the average of three floating point numbers.• Using scanf function

Task 2

Buat program untuk meng-input-kan tiga buah bilangan pecahan sembarang kemudian hitung dan cetak rata-rata dari tiga bilangan tersebut.