Computer Programming is all about algebra. In algebra, you solve for variables like x and y in their simplest form, in programming, the variables can pass on values or accept values and give you the result.For eg:Find the area of a square with side 'a' units.In algebra: Area=a2.In Programming, the program can find the area by taking input from the user.float area,a;couta;area=a*a;cout
A namespace is similar to a class in object oriented programming. A namespace contains functions defined by the programmer. for example namespace std contains functions like cout and cin.namespaces can be globaly declared like so: "using namespace std;"which includes all the functions located in the namespace std.if you only need to use cout you can globaly declare only cout like this "using std::cout;"orstd::cout
the code for the box is: # include <iostream> using namespace std; void main () { cout << "*********\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*********\n"; the code for the oval is: # include <iostream> using namespace std; void main () { cout << " ***\n"; cout <<" * *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<" * *\n"; cout << " ***\n"; the code for the arrow is: # include <iostream> using namespace std; void main () { cout << " * \n"; cout <<" ***\n"; cout <<"*****\n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; the code for the diamond: # include <iostream> using namespace std; void main () { cout << " *\n "; cout <<" * *\n"; cout<<" * *\n"; cout<<" * *\n"; cout<<"* *\n"; cout<<" * *\n"; cout<<" * *\n"; cout <<" * *\n"; cout << " *\n "; }
No, the use of 'namespace std' is not compulsory. You can specifiy it on any object reference. Specifying 'namespace' simply provides a default value. Contrast ... using namespace std; cout << "Hello world!" << endl; ... with ... std::cout << "Hello world!" << std::endl;
you don't need to use ns2 programming
#include<iostream> int main() { std::cout << "Truth table for AND gate\n\n"; std::cout << " |0 1\n"; std::cout << "-+---\n"; for (unsigned a=0; a<2; ++a) { std::cout << a << '|'; for (unsigned b=0; b<2; ++b) { std::cout << (a & b) << ' '; } std::cout << '\n'; } std::cout << std::endl; }
The question is somewhat vague. Could you elaborate?
Computer Programming is all about algebra. In algebra, you solve for variables like x and y in their simplest form, in programming, the variables can pass on values or accept values and give you the result.For eg:Find the area of a square with side 'a' units.In algebra: Area=a2.In Programming, the program can find the area by taking input from the user.float area,a;couta;area=a*a;cout
A namespace is similar to a class in object oriented programming. A namespace contains functions defined by the programmer. for example namespace std contains functions like cout and cin.namespaces can be globaly declared like so: "using namespace std;"which includes all the functions located in the namespace std.if you only need to use cout you can globaly declare only cout like this "using std::cout;"orstd::cout
In c++, to manipulate output & input you must use cin and cout. I will write a sample program to show you:#include //possibly iostream.husing namespace std; //This is what lets you use cin & coutint main(){cout
the code for the box is: # include <iostream> using namespace std; void main () { cout << "*********\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*\t*\n"; cout << "*********\n"; the code for the oval is: # include <iostream> using namespace std; void main () { cout << " ***\n"; cout <<" * *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<"* *\n"; cout <<" * *\n"; cout << " ***\n"; the code for the arrow is: # include <iostream> using namespace std; void main () { cout << " * \n"; cout <<" ***\n"; cout <<"*****\n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; cout <<" * \n"; the code for the diamond: # include <iostream> using namespace std; void main () { cout << " *\n "; cout <<" * *\n"; cout<<" * *\n"; cout<<" * *\n"; cout<<"* *\n"; cout<<" * *\n"; cout<<" * *\n"; cout <<" * *\n"; cout << " *\n "; }
cout<<"______": cin >>__>>__; [example cout<<"enter no."; cin>>a>>b; ]
In the programming language C++, cin is used to input the variable and cout is used to print a certain message or result.
If you mean you cannot use a for loop, then use a while loop: int i=0 while( i++ < 100 ) std::cout << i << " "; std::cout << std::endl; Or a do-while loop: int i=0; do std::cout << ++i << " "; while( i<100 ); std::cout << std::endl; If these are not allowed either, use a procedural loop: int i=0; again: std::cout << ++i << " "; if( i<100 ) goto again; std::cout << std::endl; If even that is not allowed, then the only option is to hard-wire: std::cout << 1 << " " << 2 << " " << [etc] << 99 << " " << 100 << std::endl; It does seem a pointless exercise when a for loop exists specifically for counting iterations like this: for( int i=1; i<=100; ++i ) std::cout << i << " "; std::cout << std::endl;
Cout is actually a statement used for outputting strings, the values of variables, and anyother thing that you want to be displayed on the screen. following is the syntax of cout statement. cout<<"String"; cout<<variable/arrays/structure variables; Note: / means that you can use any one of them. cout<<variable1<<variable2<<variable3; cout<<"string 1"<<varibale1<<"string 2"; note: we can use any combination of variables and strings we want. The << operator takes value from the variable and transfer it to cout which sends it to the output device normally the monitor using a stream called the output stream. Thanx, Ghulam Nasir(Khan) NIIT Cout is actually a statement used for outputting strings, the values of variables, and anyother thing that you want to be displayed on the screen. following is the syntax of cout statement. cout<<"String"; cout<<variable/arrays/structure variables; Note: / means that you can use any one of them. cout<<variable1<<variable2<<variable3; cout<<"string 1"<<varibale1<<"string 2"; note: we can use any combination of variables and strings we want. The << operator takes value from the variable and transfer it to cout which sends it to the output device normally the monitor using a stream called the output stream. Thanx, Ghulam Nasir(Khan) NIIT
No, the use of 'namespace std' is not compulsory. You can specifiy it on any object reference. Specifying 'namespace' simply provides a default value. Contrast ... using namespace std; cout << "Hello world!" << endl; ... with ... std::cout << "Hello world!" << std::endl;
you don't need to use ns2 programming