//Ask a same No to input again & again by using Goto Loop

void main()
{
    int i=0,n,n2,n3;
    clrscr();
    loop:
        printf("Enter the first Number:");
        scanf("%d",&n);
        i=i+1;
        if (i<5)
            goto loop;
    i=0;
    loop1:
        printf("\n\tEnter the second Number:");
        scanf("%d",&n2);
        i=i+1;
        if(i<10)
            goto loop1;
    i=0;
    loop2:
        printf("\n\n\t\tEnter the Third Number:");
        scanf("%d",&n3);
        i=i+1;
        if(i<2)
            goto loop2;

    getch();
}

Read More

//+,-,*,/ by using Pointor

void main()
{
    int a,b,p;
    int *p1;
    int *p2;
    clrscr();
    printf("\nEnter the The First No::");
    scanf("%d",&a);
    printf("\nEnter the Second No::");
    scanf("%d",&b);

    p1=&a;
    p2=&b;

    printf("\n\nAddress of the First Variable a  is  :: %u",p1);
    printf("\n\nAddress of the Second Variable a  is  :: %u",p2);

    printf("\n\n\nValue Stored of the First Address is  :: %d",*p1);
    printf("\n\n\nValue Stored of the Second Address is  :: %d",*p2);
    p=*p1+ *p2;

    printf("\n\n\nThe sume Variable is  :: %d",p);
    p=*p1-*p2;

    printf("\t\n\n\nThe subtract Variable is  :: %d",p);
    p=*p1* *p2;

    printf("\t\n\n\n\nThe Multiply Variable is  :: %d",p);
    p=*p1/ *p2;

    printf("\t\n\n\n\n\nThe Divide Variable is  :: %d",p);
    getch();
}

Read More