// A Dynamic Programming based 
// solution for 0-1 Knapsack problem 
#include <bits/stdc++.h>
using namespace std;
  
// A utility function that returns 
// maximum of two integers 
int max(int a, int b) 
{  
    return (a > b) ? a : b;  
} 
  
int knapSack(int M, int wt[], int val[], int n) 
{ 
    int K[n + 1][M + 1]; 
  
    // Build table K[][] in bottom up manner 
    for (int i = 0; i <= n; i++)  
    { 
        for (int j = 0; j <= M; j++)  
        { 
            if (i == 0 || j == 0) 
                K[i][j] = 0; 
            else if (wt[i] <= j) 
                K[i][j] = max(K[i - 1][j], val[i] 
                          + K[i - 1][j - wt[i]]); 
            else
                K[i][j] = K[i - 1][j]; 
        } 
    } 
  
    return K[n][M]; 
} 

int main() 
{ 
    int val[] = { 0, 3, 4, 5, 6 }; // Array index to start from 1
    int wt[] = { 0, 2, 3, 4, 5 }; // Array index to start from 1
    int M = 8; 
    int n = sizeof(val) / sizeof(val[0]); 
    cout<< knapSack(M, wt, val, n); 
    return 0; 
}
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#include <string>
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    cout << "Enter name:";
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    cout << "Hello " << name;
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About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}