大数加法，可调用

#include "stdio.h"
#include "string.h"
/*
name:大数加法
author:YouRmyDream
*/
void sup_addition(char a[],char b[],char c[])
{
	int c1=strlen(a);
	int c2=strlen(b);
	int d,k=0,w=0;
	int i=c1-1,j=c2-1;
	while(i>=0&&j>=0)
	{
		d=a[i--]+b[j--]+k-2*'0';
		k=d/10;
		c[w++]=d-10*k+'0';
	}

	while(i>=0)
	{
		d=a[i--]+k-'0';
		k=d/10;
		c[w++]=d-10*k+'0';
	}

	while(j>=0)
	{
		d=b[j--]+k-'0';
		k=d/10;
		c[w++]=d-10*k+'0';
	}

	if(k)
		c[w]=k+'0';
	
	c[w++]='';
	for(i=0,j=strlen(c);i<j/2;i++)
	{
		d=c[i];
	    c[i]=c[j-1-i];
		c[j-1-i]=d;
	}
}

int main()
{
	char a[200],b[200],c[300];
	while (~scanf("%s%s",a,b))
	{
	sup_addition(a,b,c);
	puts(c);
	
	}
}