杭电acmP1002A + B Problem II(大数初步运用)
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A + B Problem II
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 392274 Accepted Submission(s): 75946
Problem Description
I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.
Input
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.
Output
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. Output a blank line between two test cases.
Sample Input
2
1 2
112233445566778899 998877665544332211
Sample Output
Case 1:
1 + 2 = 3
Case 2:
112233445566778899 + 998877665544332211 = 1111111111111111110
这个方法没有ac import java.util.Scanner;public class P1002 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); while(sc.hasNext()){ int t=sc.nextInt(); long[][] a=new long[t][2]; long[] sum=new long[t]; for(int i=0;i<t;i++){ for(int j=0;j<2;j++){ a[i][j]=sc.nextLong(); } } for(int i=0;i<t;i++){ sum[i]+=a[i][0]+a[i][1]; } for(int i=0;i<t;i++){ System.out.println("Case"+(i+1)+":"); System.out.println(a[i][0]+"+"+a[i][1]+"="+sum[i]); System.out.println(); } } }}
大数初步运用
/*直接运用java中的BigDecimal方法,ac/import java.math.BigDecimal;import java.util.Scanner;public class P1002 { public static void main(String[] args) { Scanner sc=new Scanner(System.in); while(sc.hasNext()){ int n=sc.nextInt(); int num=0; for(int i=0;i<n;i++){ BigDecimal a=sc.nextBigDecimal(); BigDecimal b=sc.nextBigDecimal(); BigDecimal c=a.add(b); num++; System.out.println("Case "+num+":"); System.out.println(a.toString()+" + "+b.toString()+" = "+c.toString()); if(i<n-1){ System.out.println(); } } } }}
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