C標準類型的長度bytes

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

結論 long double類型，Solairs的gcc下最長；VC最短。科學計算慎用VC。

1. #include <math.h>
2. #include <stdio.h>
3. main()
4. {
5.  char c;
6.  int i;
7.  long int j;
8.  float k;
9.  double l;
10.  long double m;
11.  char *cp;
12.  double *lp;
13.  printf("[char]        Size Total:%d/n",sizeof(c));
14.  printf("[int]         Size Total:%d/n",sizeof(i));
15.  printf("[long int]    Size Total:%d/n",sizeof(j));
16.  printf("[float]       Size Total:%d/n",sizeof(k));
17.  printf("[double]      Size Total:%d/n",sizeof(l));
18.  printf("[long double] Size Total:%d/n",sizeof(m));
19.  printf("[double point]Size Total:%d/n",sizeof(cp));
20.  printf("[char point]  Size Total:%d/n",sizeof(lp));
21.     printf("/nThe done./n");
22.  getc(stdin);
23. }