repeating part of a function..please very urgent!!!

[dharmendra1281]

i want to make a funcion to ask for mark and then keep asking if the mark is below
0 and above 100.
i want to know how to repeat just a part of a program..
ive did some coding but its seems to not doing the right thing, i dont know why.

 #include <iostream>
#include <stdlib.h>

using namespace std;

int readValidMark();

int main()
{
	
	readValidMark();
	
	
	
	
	cout<<"\n";
	system ("pause");
	return 0;
}

int readValidMark()
{
	int mark;
	
	cout<<"enter mark";
	cin>>mark;
	
	if((mark>0 )&& (mark<100))
	{
		cout<<"the mark is"<<mark;
			
	} 
	else
	{
	  do
     	{
		cout<<"renter mark" ;
		cin>>mark;
		
		
    	}
		
	  while((mark<0)&&(mark>100));
		
		
	}

	

	
}

[giblit]

well look at your while loop. You repeat if a number is less than 0 and greater than 100 would be pretty hard. Try putting || on line 43.

[dharmendra1281]

thanks very sir for your help..

[JLBorges]

Recursive:

int read_valid_mark()
{
    int mark;
    std::cout << "enter mark: " ;

    if( std::cin >> mark )
    {
        if( mark >= 0 && mark <= 100 ) return mark ;
        else std::cout << "error: out of range\n" ;
    }
    
    else // non-numeric input
    {
        std::cout << "error: not a number\n" ;
        std::cin.clear() ; // clear error state
        std::cin.ignore( 1000, '\n' ) ; // throw the junk away
    }

    return read_valid_mark() ; // try again
}