display Pattern The Giuven

Pattern:
1
12
123
1234
12345

Source Code:

#include<stdio.h>
#include<conio.h>
void main()
{
    int a,b,c=1;                    
    clrscr();                        
    for(a=1;a<=4;a++)                
    {                               
        for(b=1;b<=a;b++)
        {
        printf(" %d ",c);
        c++;
        }
    printf("\n");
    }
    getch();
}