WAP to overlap the bits from one number to another given number if the overlapping bit position is given

1:  main()  
2:  {  
3:    int num1 = 0xffffffff;  
4:    int num2 = 0x12345678,c = 0;  
5:    int p1=0,p2=0;  
6:    int mask = 0;  
7:    // Enter the overlapping bits position  
8:    printf("Enter first overlapping bit position:");  
9:    scanf("%d",&p1);  
10:    printf("Enter second overlapping bit position:");  
11:    scanf("%d",&p2);  
12:    mask |= (1 << p1-1);  
13:    mask |= (1 << p2-1);  
14:    c = num2 & mask;  
15:    num1 |= c;  
16:    printf("After overlapping = %d\n",num1);  
17:  }