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Lect 5 - Coggle Diagram

- - - - Acessing poionted var.
        
        Asterisk operator
        int i=5; int ip;
        ip=&i;
        printf("\n%d", ip);
        printf("\n%p",ip );
        
        *ip=8 <=> i=8
      - Equality of pointer int i=5,j=3; int ip1,ip2; ip1=&i; ip2=&j;
        ip2=ip1; // ip2 point to where ip1 is pointing//
        printf("%d %d",ip1,ip2); // Output: 5 5
        
        int i=5,j=3;
        int ip1,ip2; ip1=&i,ip2=&j;
        ip2=ip1; //Overwrite val of ip1 by ip2 //
        printf("%d %d", ip1,ip2);
        //Output:5 3//
      - Val of a pointer is the mem. address of pointer, obtained using & operator
        int i=5,j;
        int *ip;
        ip=&i;
        
        & " address operator": operator det. the mem. address of i
        
        = "deferencing Operator" operator assign mem, address to ip;prvides contents in the memory location specified by a pointer
- - - - Bytes of mem are identified by address, which is in its ordered number
      - Mem unit:
        kilob=2^10 B~10^3
        megab=2^20~10^6
        gigab=2^30~10^9
        terab=2^40~10^12
        petab=2^50~10^15
        hexab=2^60~10^18
    - - datas tranfered in group of bits called words
      - words: gr of 8 bits(1 byte), 16 bits(2 bytes), 32 bits(4 buytes), 64 bits(8 bytes)
      - collection of storage location, address, where prog stored
      - address space:total number of uniquelly identifiable locations in mem.
      - comp store umbers as bit pattern->address represented as bit pattern
        Address starts from 0 to last addressable word in address space
      - Adress 64 kB( 2^6 )of mem., use 16 bits of addressing