C Notes From BU

Computer Program A computer is an electronic device capable of manipulating numbers and symbols under the control of a set of instructions known as a computer program directs the computer solve a particular problem and display results. Computer programs are written using programming languages such BASIC, FORTRAN, COBOL, PASCAL, C, C++, ALGOL and so on Purpose of Program Planning Suppose we are asked by our teacher to solve an arithmetic problem and we are not familiar with the step involved in solving that problem. In such a situation we will not be able to solve the problem. The same principle applies to the writing computer program also a programmer cannot write instructions to be followed by a computer unless the programmed known how to solve the problem manually. Suppose we know the step to be followed for solving the given problem but while solving the problem, we forget to apply some of the steps in the sequence. Obviously, we will get the wrong answer. Sim...

Types of Flowchart The system designer and programmer often use three different types of flowcharts in developing algorithms; They are:  System flowcharts  Modular program flowchart Detail program flowcharts or application flowcharts While the three flowcharts are related service a different function. System flowchart-   System flowchart play a vital role in system analysis. They illustrate graphically the elements and characteristics of a system and express its structure and relationships in terms of flowchart symbols. This chart describes the sequences of major processing operations both manual and computer, data flow and files to be used in processing and the flow of processing control. System flowchart is used by systems analysts for analysing or designing system.           During the problem recognition stage, they illustrate data flow and relationship in the existing system. During the system ...