C++ Programming Code Examples
C++ > Games Code Examples
Turn based battle system
/* Turn based battle system */
#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>
int hp = 20, mp = 20, ehp = 35, move;
void lose (void)
{
cout << "You lose." << endl;
hp = 20;
mp = 20;
ehp = 20;
}
void win (void)
{
cout << "You win." << endl;
hp = 20;
mp = 20;
ehp = 20;
}
int main()
{
label:
cout << "ehp: " << ehp << endl << "hp: " << hp << endl << "mp: " << mp << endl << "(1) Attack" << endl << "(2) Magic Missle" <<endl << "(3) Summon" << endl;
cin >> move;
system("cls");
cout << "Status:" << endl;
if (move == 1)
{
cout << "You sliced the enemy with your sword." << endl;
ehp -= 1;
if (ehp < 0)
{
win();
return 0;
}
if (hp < 0)
{
lose();
return 0;
}
cout << "The enemy cast a Magic Missle." << endl << endl;
hp -= 2;
}
if (move == 2)
{
cout << "You cast a devistating Magic Missle." << endl;
ehp -= 2;
mp -= 1;
if (ehp < 0)
{
win();
return 0;
}
if (hp < 0)
{
lose();
return 0;
}
cout << "The enemy used his sword." << endl << endl;
hp -= 1;
}
if (move == 3)
{
cout << "You summoned Ultima!" << endl;
ehp -= 10;
mp -= 15;
hp -= 1;
if (ehp < 0)
{
win();
return 0;
}
if (hp < 0)
{
lose();
return 0;
}
cout << "The enemy used his sword." << endl << endl;
hp -= 1;
}
goto label;
}
The cin object is used to accept input from the standard input device i.e. keyboard. It is defined in the iostream header file. C++ cin statement is the instance of the class istream and is used to read input from the standard input device which is usually a keyboard. The extraction operator(>>) is used along with the object cin for reading inputs. The extraction operator extracts the data from the object cin which is entered using the keyboard. The "c" in cin refers to "character" and "in" means "input". Hence cin means "character input". The cin object is used along with the extraction operator >> in order to receive a stream of characters.
In computer programming, we use the if statement to run a block code only when a certain condition is met. An if statement can be followed by an optional else statement, which executes when the boolean expression is false. There are three forms of if...else statements in C++: • if statement, • if...else statement, • if...else if...else statement, The if statement evaluates the condition inside the parentheses ( ). If the condition evaluates to true, the code inside the body of if is executed. If the condition evaluates to false, the code inside the body of if is skipped.
A predefined object of the class called iostream class is used to insert the new line characters while flushing the stream is called endl in C++. This endl is similar to \n which performs the functionality of inserting new line characters but it does not flush the stream whereas endl does the job of inserting the new line characters while flushing the stream. Hence the statement cout<<endl; will be equal to the statement cout<< '\n' << flush; meaning the new line character used along with flush explicitly becomes equivalent to the endl statement in C++.
#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program.
In C++, goto is a jump statement and sometimes also referred as unconditional jump statement. It can be used to jump from goto to a labeled statement within the same function. The target label must be within the same file and context. Please note that the use of goto statement is highly discouraged in any programming language because it makes difficult to trace the control flow of a program, making hard to understand and modify the program.
As the name already suggests, these operators help in assigning values to variables. These operators help us in allocating a particular value to the operands. The main simple assignment operator is '='. We have to be sure that both the left and right sides of the operator must have the same data type. We have different levels of operators. Assignment operators are used to assign the value, variable and function to another variable. Assignment operators in C are some of the C Programming Operator, which are useful to assign the values to the declared variables. Let's discuss the various types of the assignment operators such as =, +=, -=, /=, *= and %=. The following table lists the assignment operators supported by the C language:
A program shall contain a global function named main, which is the designated start of the program in hosted environment. main() function is the entry point of any C++ program. It is the point at which execution of program is started. When a C++ program is executed, the execution control goes directly to the main() function. Every C++ program have a main() function.
The if...else statement executes two different codes depending upon whether the test expression is true or false. Sometimes, a choice has to be made from more than 2 possibilities. The if...else ladder allows you to check between multiple test expressions and execute different statements. In C/C++ if-else-if ladder helps user decide from among multiple options. The C/C++ if statements are executed from the top down. As soon as one of the conditions controlling the if is true, the statement associated with that if is executed, and the rest of the C else-if ladder is bypassed. If none of the conditions is true, then the final else statement will be executed.
Execute system command. Invokes the command processor to execute a command. If command is a null pointer, the function only checks whether a command processor is available through this function, without invoking any command. The effects of invoking a command depend on the system and library implementation, and may cause a program to behave in a non-standard manner or to terminate.
