The C programming language is thought to be case-sensitive. Both the sentences "Hello learner" and "HELLO LEARNER" signify the same thing, but the second one differs in that all the letters are capitalised.
Example Coding :
// Respond to the user's menu selection.
switch (choice)
{
case CIRCLE_CHOICE:
cout << "\nEnter the circle's radius: ";
cin >> radius;
if (radius < 0)
cout << "\nThe radius can not be less than zero.\n";
else
{
area = PI radius radius;
cout << "\nThe area is " << area << endl;
}
break;
case RECTANGLE_CHOICE:
cout << "\nEnter the rectangle's length: ";
cin >> length;
cout << "Enter the rectangle's width: ";
cin >> width;
if (length < 0 || width < 0)
{
cout << "\nOnly enter positive values for "
<< "length and width.\n";
}
else
{
area = length * width;
cout << "\nThe area is " << area << endl;
}
break;
case TRIANGLE_CHOICE:
cout << "Enter the length of the base: ";
cin >> base;
cout << "Enter the triangle's height: ";
cin >> height;
if (base < 0 || height < 0)
{
cout << "\nOnly enter positive values for "
<< "base and height.\n";
}
else
{
area = base height 0.5;
cout << "\nThe area is " << area << endl;
}
break;
case QUIT_CHOICE:
cout << "Program ending.\n";
break;
default:
cout << "The valid choices are 1 through 4. Run the\n"
<< "program again and select one of those.\n";
}
return 0;
}
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