C标准类型的长度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

结论 long double类型，Solairs的gcc下最长；VC最短。科学计算慎用VC。

#include <math.h>

#include <stdio.h>

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);

}