WIN2K/VC下面：
    [char] Size Total:1
    [int] Size Total:4
    [long int] Size Total:4
    [float] Size Total:4
    [double] Size Total:8
    [long double] Size Total:8
    [double point]Size Total:4
    [char point] Size Total:4
    WIN2K/dev-c++下面 &
    Ubuntu8.10 gcc 下面：
    [char] Size Total:1
    [int] Size Total:4
    [long int] Size Total:4
    [float] Size Total:4
    [double] Size Total:8
    [long double] Size Total:12
    [double point]Size Total:4
    [char point] Size Total:4
    SUN Ultra10 Solairs8(32bit)GUNgcc:
    [char] Size Total:1
    [int] Size Total:4
    [long int] Size Total:4
    [float] Size Total:4
    [double] Size Total:8
    [long double] Size Total:16
    [double point]Size Total:4
    [char point] Size Total:4
    結(jié)論 long double類型，Solairs的gcc下最長(zhǎng)；VC最短?？茖W(xué)計(jì)算慎用VC。
    #include
    #include
    main()
    {
    char c;
    int i;
    long int j;
    float k;
    double l;
    long double m;
    char *cp;
    double *lp;
    printf("[char] Size Total:%d\n",sizeof(c));
    printf("[int] Size Total:%d\n",sizeof(i));
    printf("[long int] Size Total:%d\n",sizeof(j));
    printf("[float] Size Total:%d\n",sizeof(k));
    printf("[double] Size Total:%d\n",sizeof(l));
    printf("[long double] Size Total:%d\n",sizeof(m));
    printf("[double point]Size Total:%d\n",sizeof(cp));
    printf("[char point] Size Total:%d\n",sizeof(lp));
    printf("\nThe done.\n");
    getc(stdin);
    }