C++ for Beginners...Masters by Ankit Asthana

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In this chapter, we will introduce the fundamental concepts of C++ and then slowly move towards creating our own C++ programs. 1. This program prints the message ‘My first C++ program’ on the screen. h> void main() { cout<<" My first C++ Program"; } Let us observe this piece of code carefully. This program consists of a function called ‘main’. Functions are one of the fundamental building blocks of C++. We will learn more about them in later chapters but for now all we need to know is that every C++ program has a ‘main’ function.

In this section, we will learn about floating point variables and understand how they are stored in the computers memory. 10. 4 * 1038. 2 given below shows how floating variables are stored in the computers memory. 4 given below declares two floating variables ‘var1’ and ‘var2’ and displays them on the screen. 3 Floating Point Variables 24 COMMON PROGRAMMING ERRORS Not declaring all variables used in a program will lead to a syntax error. Attempting to store one data type in a variable declared for a different type might result in a syntax error.

Testing whether one quantity is larger than another is one example of a testing/decision operation. Similarly, testing whether a specific quantity is positive or zero is another typical test. ELSE statements would typically characterize this test operation This symbol is used for input or output operations. For example, if we want to input the radius of a circle or output the calculated area of the circle. 1 Types of structured flow-charts We described sequence flow-chart in the previous section, in this section we will learn about the other two types of widely used structured flow-charts.

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