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# Data Type and Operator - PowerPoint PPT Presentation

Data Type and Operator. By: Muhammad Zidny Naf’an. Data Type. Declaration. Data type and variable declaration: data_type variable_name; Set a value to variable: variable = value; We can directly set a value to varible when declaration: data_type variable_name = value;.

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## PowerPoint Slideshow about ' Data Type and Operator' - reya

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### Data Type and Operator

• Data type and variable declaration:

data_type variable_name;

• Set a value to variable:

variable = value;

• We can directly set a value to varible when declaration:

data_type variable_name = value;

Operator the sign that use for operating or manipulation

Variable or value that operated called the operand

3 + 2

operand

operator

operand

• Using arithmetic operator

• To give a value to variable

• Ex:

a = 1;

c = 2 + (b = 1);

a = b = c = d = e = 1;

• Symbol of decrement operator: --

Used for subtracting by 1

• The symbol of increment operator: ++

Ex:

x++ like with x = x + 1.

y-- like with y = y – 1.

• Can be placed front (pre-) or behind (post-) operand.

• The effect for placing the operator:

a = 7;

b = 2;

c = b + a++;

value of c is 9 not 10

that statements above like with this statement below:

c = b + a;

a = a + 1;

• If increment operator placed in front of operand, so operand will add by 1 first.

Ex:

a = 7;

b = 2;

c = b + ++a;

• that statements above like with this statement below:

a = a + 1;

c = b + a;

c = 10;

• For manipulating bit

• Bitwise operator only for int or char

• Example

• shorten assignment operator,

• Example x = x + 2 x += 2

• Compare the relationship between two operands

• Obtain the value of two possibles, ex:

statement1 ? statement12: statement3

If statement1 truethan the result equal with statement2, if false than statement3.

• Contoh:

• Placing two statement in one rule that need one statement

• Example use in looping for:

• for(i=0, j=0; i<10; i++, j--) { ..}

• Connecting two or more statements to make one condititon statement

• Contoh:

• If x is integer, from these values, where the value can put to x?

• 10

• 5.7

• 40000

• Change these formulas into C++ language

• A program to calculate the final score of a student has 5 variables for student name, studentidentification numbers, the value of the task, the mid term and final exam scores of the semester. The final value calculated by the formula: (task * 20%) + (midterm * 40%) + (final exam * 40%). Make the program!

Write the program to display the number of days, hours, minutes, and seconds of inputin the form of the length of time in seconds. For example, input 100.000 seconds willproduce output

1 day, 3 hours, 46 minutes, 40 seconds.Input of the program is of type long integer.Program output is the number of days, hours, minutes, and seconds from the input.