C :

#include<stdio.h>
#define N 100
int Even(int a)
{
	if (a%2 == 0)
		return 1;
	else 
		return 0;
} 
int main()
{
	int a[N];
	int i = -1,sum = 0,j;
	do
	{
		i++;
		scanf("%d",&a[i]);
	}while(a[i]>0);
	for (j = 0; j<=i-1 ;j++)
	{
		if(!Even(a[j]))
			sum +=a[j];
	}
	printf("%d",sum);
	return 0;
}

C++ :

#include<iostream>
using namespace std;
int even(int n);  
int main() 
{  
    int x,jsh=0;  
    cin>>x;  
    while(x>0)  
    {   
        if(even(x)==0)     
            jsh+=x;   
        cin>>x;   
    }   
    cout<<jsh;  
    return 0;
}  
int even(int n) 
{  
    if(n%2==0)  
        return 1;  
    else    
    return 0;  
}