//28.Se citesc doua numere naturale n si m (n<=100)
//si apoi se citeste o matrice cu n linii si m
//coloane avand elemente numere naturale cu cel 
//mult 6 cifre fiecare. Afisati numarul de coloane
//pe care se afla un numar maxim de elemente cu 
//proprietatea ca sunt mai mari decat toti vecinii
//lor. Se considera vecini elementele alaturate 
//pe linie sau pe coloana. 
//Se vor scrie si folosi functii pentru: 
//- citirea matricii 
//- verificarea daca un element din matrice e 
//mai mare decat toti vecinii sai 
//- determinarea numarul de elemente de pe o 
//coloana care sunt mai mari decat toti vecinii lor 
//- determinarea numarul maxim de elemente de 
//pe o coloana care sunt mai mari decat toti vecinii lor 
//- determinarea numarului de coloane care respecta 
//cerinta problemei. 
//Exemplu: 

//5 6 
//11 21 909 343 200 900 
//500 11 200 33 343 200 
//909 11 901 33 343 901 
//109 2 35 47 5 67 
//909 121 901 323 343 901 

//2 
//Coloanele care respecta cerinta sunt cele cu 
//numerele de ordine 3 si 6 (numerotarea incepe de la 1). 
#include <iostream>
using namespace std;
void citire(long a[100][100], int &n, int &m)
{int i, j;
cin>>n>>m;
for(i=1;i<=n;i++)
   for(j=1;j<=m;j++)
      cin>>a[i][j];
}

int verificare(long a[100][100], int l, int c)
{if(a[l][c]<a[l][c-1]||a[l][c]<a[l][c+1]||a[l][c]<a[l-1][c]||a[l][c]<a[l+1][c])
     return 0;
return 1;
}

int nrcol(long a[100][100], int n, int c)
{int k=0, i;
for(i=1;i<=n;i++)
   if(verificare(a,i,c)==1)
        k++;
return k;
}

int maxim(long a[100][100], int n, int m)
{int i=1, max;
max=nrcol(a,n,i);
for(i=2;i<=m;i++)
   if(max<nrcol(a,n,i))
       max=nrcol(a,n,i);
return max;
}

int col(long a[100][100], int n, int m)
{int max, i, k=0;
max=maxim(a,n,m);
for(i=1;i<=m;i++)
   if(nrcol(a,n,i)==max)
       k++;
return k;
}
int main() 
{long a[100][100];
int n, m;
citire(a,n,m);
cout<<col(a,n,m);
return 0;
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

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
}