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ÔÚVC 6.0 ϵ÷ÊÔͨ¹ý£¡
#include <stdio.h>
#define MAX 255

void Add(int a[],int b[],int l1,int l2);
void Sub(int a[],int b[],int l1,int l2);
void Mul(int a[],int b[],int l1,int l2);
void Clear();
//ΪÁ˱ãÓÚ¼ÆËãʱµÄ½øλÎҰѼÆËãÊýÔÚ´æÈëÊý×éʱ¶¼µ¹ÖÃÁË
void TransOrder(char s[], int a[],int l);

int a[MAX],b[MAX],c[MAX];


void main()
{
int i=0;
char s1[MAX],s2[MAX];
int length1=0,length2=0;//²Ù×÷ÊýµÄ³¤¶È
printf("Please input first number:");
do
{
scanf("%c",&s1);
i ;
}while(s1[i-1]!='\n');
length1=i-1;//±éÀúʱµÄÑ­»·Ó¦Ð´³Éfor(int i=0;i<length1;i );
i=0;

printf("\nPlease input secend number:");
do
{
scanf("%c",&s2);
i ;
}while(s2[i-1]!='\n');
length2=i-1;
i=0;
Clear();
TransOrder(s1,a,length1);
TransOrder(s2,b,length2);
printf("a * b =");
Mul(a,b,length1,length2);
printf("a b =");
Add(a,b,length1,length2);
/*Èç¹ûÕâÀï²»¼ÓÉÏTransOrder(s1,a,length1);ºÍTransOrder(s2,b,length2)¼ÆËãa-b¾Í»á³ö´í£¬²»¹âÊÇa-b,Ö»ÒªÊÇ°Ña*b»òa bµÄº¯Êý·Åµ½Õâ¸öλÖÃÇ°Ãæ²»¼Óת»»µÄº¯Êý¶¼»á³ö´í¡£ÎÒÓõ÷ÊÔÆ÷¸úÁËһϣ¬·¢ÏÖÔÚÖ´ÐеÚÈý¸ö¼ÆË㺯Êýʱa[]ÖеÄÖµ±»¸Ä±äÁË£¬¿ÉΪʲô»á±»¸ü¸ÄÎÒÈ´²»ÖªµÀ£¬Èç¹ûË­ÖªµÀÁË»¹Çë¸æËßÎÒÒ»Éù£¬3Q*/ TransOrder(s1,a,length1);
TransOrder(s2,b,length2);
printf("a - b =");
Sub(a,b,length1,length2);

return ;
}

void TransOrder(char s[],int a[],int l)
{
int i=0;
for(i=0;i<l/2;i )
{
a=(int)s[l-i-1]-48;
a[l-i-1]=(int)s-48;
}
if(l%2!=0)
a[l/2]=(int)s[l/2]-48;
}

void Add(int a[],int b[],int l1,int l2)
{
int len=l1<l2?l2:l1;
int temp=0;
for(int i=0;i<MAX;i )
c=0;
for(i=0;i<len;i )
{
temp=a b;
if(temp>9)
{
c=temp;
a[i 1] =1;
}
else
c=temp;
}
for(i=len-1;i>=0;i--)
printf("%d",c);
printf("\n");
}

void Sub(int a[],int b[],int l1,int l2)
{
int len=l1<l2?l2:l1;
int temp=0;
for(int i=0;i<MAX;i )
c=0;
if(l1>=l2)
{
for(int i=0;i<len;i )
{
if(a<b)
{
a[i 1]-=1;
a =10;
c=a-b;
}
else
c=a-b;
}
}
else
{
for(int i=0;i<len;i )
{
if(b<a)
{
b[i 1]-=1;
b =10;
c=b-a;
}
else
c=b-a;
}
c[i-1]*=-1;
}

for(i=len-1;i>=0;i--)
printf("%d",c);
printf("\n");
}

void Mul(int a[],int b[],int l1,int l2)
{
int k1=0,k2=0;//ÓÃÀ´¼Ç¼Á½¸öÊý×éÖÐÇ°ÃæÁ¬ÐøµÄÁãµÄ¸öÊý
int i=0,j=0,k=0,index=0;
int temp=0;
for(i=0;i<MAX;i )
c=0;
i=0;
while(a==0)
{
k1 ;
i ;
}
i=0;
while(b==0)
{
k2 ;
i ;
}
//°Ña,bÖеÄ0È¥µôºóÔÙ½øÐÐÏà³Ë
//ÄÃaÖеÄÿһÏîÓëbÖеÄÿһÏîÏà³Ë½á¹û´æÈëcÏà¶ÔÓ¦µÄλÖÃÖÐ
//ÒòΪÊdz˷¨ÔËËãËùÒÔÔÚ´æÈëcÖÐʱÿ´Î¶¼ÒªÓ뵱ǰλÖÃÉϵÄcÊý×éÔªËؽøÐÐÒ»´Î¼Ó·¨ÔËËã
for(i=k1,k=0;i<l1;i ,k )
{
for(j=k2,index=0;j<l2;j ,index )
{
temp=a*b[j];
int t=0,jinwei=0;
if(temp>9)
{
c[k index] =temp;
if(c[k index]>9)
{
t=c[k index];
c[k index]=t;
c[k index 1] =1;
int jinwei=1;
while(c[k index jinwei]>9)
{
t=c[k index jinwei];
c[k index jinwei]=t;
c[k index jinwei 1] =1;
jinwei ;
}
}
c[k index 1] =temp/10;
jinwei=1;
while(c[k index jinwei]>9)
{
t=c[k index jinwei];
c[k index jinwei]=t;
c[k index jinwei 1] =1;
jinwei ;
}
}
else
{
if(c[k index] temp>9)
{
jinwei=1;
t=c[k index];
c[k index]=(t temp);
c[k index 1] =(t temp)/10;
while(c[k index jinwei]>9)
{
t=c[k index jinwei];
c[k index jinwei]=t;
c[k index jinwei 1] =1;
jinwei ;
}
}
else
c[k index] =temp;
}
}
}
for(i=c[k index-1]==0?k index-2:k index-1;i>=0;i--)
printf("%d",c);
for(i=0;i<k1 k2;i )
printf("%d",0);
printf("\n");
}

void Clear()
{
for(int i=0;i<MAX;i )
{
a=b=c=0;
}
}
---------------------------------
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