A+B Problem II
时间限制:
3000 ms | 内存限制:
65535 KB
难度:
3
- 描述
-
I have a very simple problem for you. Given two integers A and B,your job is to calculate the Sum of A + B.
A,B must be positive.
- 输入
- The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow,each line consists of two positive integers,A and B. Notice that the integers are very large,that means you should not process them by using 32-bit integer. You may assume the length of each integer will not exceed 1000.
- 输出
- For each test case,you should output two lines. The first line is "Case #:",# means the number of the test case. The second line is the an equation "A + B = Sum",Sum means the result of A + B. Note there are some spaces int the equation.
- 样例输入
-
2 1 2 112233445566778899 998877665544332211
- 样例输出
-
Case 1: 1 + 2 = 3 Case 2: 112233445566778899 + 998877665544332211 = 1111111111111111110
解题方法:
先将字符串反转存入整形数组,整形数组按位相加,若相加后大于十则前一位加一。相加结束后,
倒叙逐个输出整形数组的每一位数。
代码如下:
#include<stdio.h> #include<string.h> #include<stdlib.h> int max(int x,int y) { int z; z=x>y ? x:y; return z;//比较两个数的大小,将较大的数赋值给返回值 } int main() { int i,n,t=0,z,lena,lenb,num1[1100],num2[1100]; char a[1100],b[1100]; scanf("%d",&n); while(n--) { memset(num1,sizeof(num1)); memset(num2,sizeof(num2));//int型数组清零 scanf("%s%s",&a,&b); lena=strlen(a); lenb=strlen(b); for(i=0;i<lena;i++) num1[lena-1-i]=a[i]-'0'; for(i=0;i<lenb;i++) num2[lenb-1-i]=b[i]-'0'; z=max(lena,lenb); for(i=0;i<z;i++)//此处i值的范围就是两个字符串长度的最大者 { num1[i]=num1[i]+num2[i]; if(num1[i]>9)//处理相加大于十的情况 { num1[i]=num1[i]-10; num1[i+1]++; } } t++; if(num1[z]==0)// 判断数组第z位是否为零 { printf("Case %d:\n",t); printf("%s + %s = ",a,b); for(i=z-1;i>=0;i--) printf("%d",num1[i]); printf("\n"); } else { printf("Case %d:\n",b); for(i=z;i>=0;i--) printf("%d",num1[i]); printf("\n"); } } return 0; }