UVA424 （高精度）

题目：

One of the first users of BIT's new supercomputer was Chip Diller. He extended his exploration of powers of 3 to go from 0 to 333 and he explored taking various sums of those numbers.

``This supercomputer is great,'' remarked Chip. ``I only wish Timothy were here to see these results.'' (Chip moved to a new apartment, once one became available on the third floor of the Lemon Sky apartments on Third Street.)

Input

The input will consist of at most 100 lines of text, each of which contains a single VeryLongInteger. Each VeryLongInteger will be 100 or fewer characters in length, and will only contain digits (no VeryLongInteger will be negative).

The final input line will contain a single zero on a line by itself.

Output

Your program should output the sum of the VeryLongIntegers given in the input.

Sample Input

123456789012345678901234567890
123456789012345678901234567890
123456789012345678901234567890
0

Sample Output

370370367037037036703703703670

题目大意：每行为一个数字，对输入的所有数字相加。

方法：从后位算起，将递进的数值累加到前一位然后再实现相加。

由于最后可能会出现累加的值没有递进的情况，所以在输入0时将最后累加的数组加一次0实现递进，然后再break。

代码：

#include<stdio.h>
#include<string.h>
int main () {
	char a[150];
	int b[150]={0};
	int i,j,k,temp;
	while(scanf("%s",a)) {	
		if(a[0]=='0') {
			for (i=149;b[i]==0;i-- );
			for(;i>=0;i--) {
				temp=b[i];
				b[i]=temp%10;
				b[i+1]+=temp/10;
			}
			break;
		}
		for(i=strlen(a)-1,j=0;i>=0;i--,j++) {
			temp=b[j]+(a[i]-'0');
			b[j]=temp%10;
			b[j+1]+=temp/10;
		}
	}
	for(i=149;b[i]==0;i--);
	for(;i>=0;i--) {
		printf("%d",b[i]);
	}
	printf("\n");
	return 0;
}