Programming language is the language used in the computer to perform certain tasks. As well as the language used in human in general, programming languages many kinds. Programming languages can be categorized based on levels, such as low level language, the language level is, high level language.
low level language is very mechanical, and difficult to be understood by humans. This language using binary code, which can be understood by the computer hardware and have a very good ability in accessing hardware. One of the language entry in this category is the assembly
Middle level language is the language of the rules written language approach similar to the human language but have a high level of ability and speed the process of accessing hardware similar to the low level language. One of the languages that enter this category is C. High level language is a programming language that is more close to human language. Most high level language has syntax to use the English language. In creating a program, programmers use a very general language, high level, such as C, Pascal, Basic.
Computers are machines that can perform a basic command (instruction set). Computers can only be given command of basic commands such. The commands are more complicated should be translated into a series of basic commands that can be understood computer (the commands included in the instruction set computer) that can ultimately resolve the desired task, even with the run some basic operation, not a complicated operation.
Programming language is a language that can be translated into a collection of basic commands such. Translation done by a computer program called a compiler. Each programming language has its own compiler. For example, C + + compiler will not understand the program written with the Java language. The syntax of programming languages more easily understood by the people of the basic syntax. However, of course, the computer can only perform the basic commands. But the place where the important role of the compiler as a mediator between the programming language with the command base.
Output yielded from data processing can be classified into 4 kinds of form :
Three first faction is output which can be used direct by human being, faction is fourthly is usually used as by a input to be processed or as input for the computer of other.
To get the forms output is hence required by a appliance to present it, that is appliance output. Output device can the in form of as follows:
Output of is in form of hard copy in character permanent and more portable. Device of Output hard copy the device which common used is printer classified by into two categories of impact printer and non impact printer. Output device hard copy the other device is plotter and computer output to microfilm. While soft copy the device can be in the form of the video display, flat panel and speaker. Drive Device utilizing media of disk magnetic is disk drive, while utilizing media of tape magnetic is tape drive.
WAN and LAN can the in form of simplest, that is star network, hierarchical tree network, loop network, ring network, bus network, web network until most complex, that is meta network (network from a network). Form of the network that is with the topology term.
Some node connected with a central node or host node that have the shape of network as form star. All communications handled and arranged and arranged direct by central node. Central Node to do something all responsibility to arrange the information current of among node the other. If node which is one wishing to communicate with the node the other , hence have to go through central node. Central Node usually in the form of large computer or mainframe computer which to connected with other node, which form of some mini computer or micro computer to through a link.
From by name, this network have the shape of tree, which consisted of central node attributed to node the other. Central Node usually in the form of large computer or mainframe computer as host computer which to constitute top hierarchical and have function to control the node which can in the form of mini computer or micro computer.
Loop Network is link between node serially in the form of a circle be closed. In the form of this nothing central node or host node, all having same status.
This form of connecting some node in data flow. Each node can to do something the operation duty which different each other. As does at loop network, nothing central node and all node have the same status.
This form of representing merger form the loop network and bus network. If one of node do not function or destroy , hence will not influence the other communications node because separated from data flow. This matter differ from the loop network, if one of destroyed node, hence will influence the node the other.
Web network or mesh network or completely connected network is the form network which is each node in network can connect with node other to through some link.
CPU ( central processing unit) is place process the instruction program. At micro computer, this processor namely as microprocessor. CPU consisted of two bodywork. That is control unit and ALU(arithmetic and logic unit). Beside two the bodywork, CPU have some savings which small size and namely is register.
Control Unit
This shares undertake to arrange and control all equipments of exist in system computer. Control Unit arrange when input appliance accept the data and when data appliance processed and also when presented at appliance output. Control Unit interpret the instruction from program computer, to bring data from input appliance to main memory, taking data from main memory to be processed. If there are any instruction for the calculation of arithmetic or logic comparison, control unit send the instruction to arithmetic and logic unit. Result from this data processing brought by control unit to main memory again to be kept.
Become the duty from control unit that is :
Arranging and controlling appliance of input and output.
Taking instruction from main memory.
Taking data from main memory when needed by process.
Sending instruction to ALU(arithmetic and logic unit) if there are any calculation of arithmetic or logic comparison and also observe the job of arithmetic and logic unit.
To keep of result of process to main memory
Arithmetic And Logic Unit
Especial duty from ALU (arithmetic and logic unit) is to perform all calculation of arithmetic or mathematics that happened as according to instruct ALU to perform operate the arithmetic und accretion, operate for the arithmetic the other. of like reduction , multiplication, and other quantifying .ion program. So that electronic circuit in ALU used to execute the this operation arithmetic is referred as by adder. Other duty from ALU is to perform the decision from logic operation as according to instruction program the. Logic operation covering comparison of two logic element by using logic operator.
Register
Register used to be depository of instruction and data which being processed by CPU, instruction and other data awaiting innings to be processed still be kept in main memory.
