1. 数据结构
首先,我们需要定义合适的数据结构来存储每个号码的呼叫记录。我们可以使用一个哈希表(hash table)来存储键值对,其中键是客户号码,值是一个结构体,记录了该号码的呼叫次数和放通次数。
2. 算法流程
算法的主要流程如下:
- 当一个新的呼叫请求到达时,检查该号码是否已经在哈希表中。
- 如果不在,创建一个新的条目并将其添加到哈希表中。
- 如果已存在,增加该号码的呼叫次数。
- 根据呼叫次数和设定的比例计算是否应该放通。
- 如果应该放通,增加放通次数,并处理呼叫请求。
- 如果不应该放通,拒绝呼叫请求,并记录拒绝原因。
3. 伪代码
function handle_call(number, passthrough_ratio):
if number not in call_records:
call_records[number] = {
"call_count": 0,
"passthrough_count": 0
}
call_records[number]["call_count"] += 1
if call_records[number]["call_count"] % (1 / passthrough_ratio) == 0:
call_records[number]["passthrough_count"] += 1
process_call(number) // 处理呼叫请求
return "Call accepted"
else:
return "Call rejected"
4. C语言实现
#include <stdio.h>
#include <stdlib.h>
#define MAX_NUMBERS 10000
typedef struct {
int call_count;
int passthrough_count;
} CallRecord;
CallRecord call_records[MAX_NUMBERS];
void initialize_call_records() {
for (int i = 0; i < MAX_NUMBERS; i++) {
call_records[i].call_count = 0;
call_records[i].passthrough_count = 0;
}
}
int find_record_index(char* number) {
// 实现一个简单的哈希函数
int hash = 0;
for (int i = 0; number[i] != '\0'; i++) {
hash = (hash << 5) - hash + number[i];
}
return hash % MAX_NUMBERS;
}
const char* handle_call(char* number, double passthrough_ratio) {
int index = find_record_index(number);
if (call_records[index].call_count == 0) {
// 创建新记录
call_records[index] = (CallRecord){1, 0};
} else {
// 增加呼叫次数
call_records[index].call_count++;
}
// 计算是否应该放通
if ((double)call_records[index].call_count / (call_records[index].passthrough_count + 1) < passthrough_ratio) {
// 放通呼叫
call_records[index].passthrough_count++;
// 处理呼叫请求
printf("Call from %s accepted.\n", number);
return "Call accepted";
} else {
// 拒绝呼叫
printf("Call from %s rejected.\n", number);
return "Call rejected";
}
}
int main() {
initialize_call_records();
// 模拟处理呼叫请求
const char* numbers[] = {"1234567890", "0987654321", "1029384756", "1111111111"};
double passthrough_ratio = 3.0 / 10.0;
for (int i = 0; i < 30; i++) {
for (int j = 0; j < sizeof(numbers) / sizeof(numbers[0]); j++) {
const char* result = handle_call(numbers[j], passthrough_ratio);
printf("%s\n", result);
}
}
return 0;
}