POJ3094-Quicksum解题报告

Quicksum

Time Limit: 1000MS		Memory Limit: 65536K
Total Submissions: 10876		Accepted: 7489

DescriptionA checksum is an algorithm that scans a packet of data and returns a single number. The idea is that if the packet is changed, the checksum will also change, so checksums are often used for detecting transmission errors, validating document contents, andin many other situations where it is necessary to detect undesirable changes in data.For this problem, you will implement a checksum algorithm called Quicksum. A Quicksum packet allows only uppercase letters and spaces. It always begins and ends with an uppercase letter. Otherwise, spaces and letters can occur in any combination, includingconsecutive spaces.A Quicksum is the sum of the products of each character's position in the packet times the character's value. A space has a value of zero, while letters have a value equal to their position in the alphabet. So, A=1, B=2, etc., through Z=26. Here are exampleQuicksum calculations for the packets "

ACM

" and "

MID CENTRAL

":

ACM: 1*1  + 2*3 + 3*13 = 46

MID CENTRAL: 1*13 + 2*9 + 3*4 + 4*0 + 5*3 + 6*5 + 7*14 + 8*20 + 9*18 + 10*1 + 11*12 = 650

InputThe input consists of one or more packets followed by a line containing only # that signals the end of the input. Each packet is on a line by itself, does not begin or end with a space, and contains from 1 to 255 characters.OutputFor each packet, output its Quicksum on a separate line in the output.Sample Input

ACM
MID CENTRAL
REGIONAL PROGRAMMING CONTEST
ACN
A C M
ABC
BBC
#

Sample Output

46
650
4690
49
75
14
15

#include<iostream>using namespace std;int value[100];void setvalue(){int i = 1, num;value[' '] = 0;for(num = 'A'; num <= 'Z'; num ++){value[num] = i;i++;}}int main(){setvalue();char characters[10000];int i,j,sum = 0,length;while(1){gets(characters);if(!strcmp(characters,"#")){return 0;}length = strlen(characters);for(i = 0;i <= length; i++){sum += value[characters[i]]*(i+1);}cout << sum <<endl;sum = 0;}system("pause");return 0;}

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