习题3-1 得分 UVa1585

Description

There
is an objective test result such as "OOXXOXXOOO". An 'O' means a correct answer of a problem and an 'X' means a wrong answer. The score of each problem of this test is calculated by itself and its just previous consecutive 'O's only when the answer is correct.
For example, the score of the 10th problem is 3 that is obtained by itself and its two previous consecutive 'O's.Therefore,
the score of "OOXXOXXOOO" is 10 which is calculated by ``1+2+0+0+1+0+0+1+2+3".You
are to write a program calculating the scores of test results.

Input 

Your
program is to read from standard input. The input consists of T test cases. The number of test cases T is given in the first line of the input. Each test case starts with a line containing a string composed by 'O' and 'X' and the length of the string is more
than 0 and less than 80. There is no spaces between 'O' and 'X'.

Output

Your program is to write to standard output. Print exactly one line for each test
case. The line is to contain the score of the test case.The
following shows sample input and output for five test cases.

Sample
Input

5 

OOXXOXXOOO 

OOXXOOXXOO 

OXOXOXOXOXOXOX 

OOOOOOOOOO 

OOOOXOOOOXOOOOX

Sample
Output

10975530

题目分析：设置变量t和ans，分别代表权值和总分。

出现O：总分加上权值，权值加1；

出现X：权值置零。

代码实现：#include<cstdio>
#include<cstring>
using namespace std;

int n, t, ans;
int main()
{
char s[100];
scanf ("%d", &n);
while (n--)
{
scanf ("%s", s);
t = ans = 0;
for (int i = 0; s[i] != '\0'; ++i)
{
if (s[i] == 'O')
ans += ++t;
else t = 0;
}
printf ("%d\n", ans);
}
return 0;
}