输入：输入空格及26小写英文字母出现的频次，然后输入一小段文字。 输出： 对整段文字 输出=“:整段文字字符数回车”； WPL“=:整段文字的WPL值回车”； 平均比特数“=：整段文字的平均每个字符的比特数回车”； 对小段文字 编码“=：二进制编码回车”； 译码“=：对上述编码进行译码回车”；c语言

以下是C语言的实现代码，可以帮助您完成该任务：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_FREQ 26
#define MAX_TEXT 1000

// 获取输入的频次统计信息
void get_char_freq(int char_freq[MAX_FREQ]) {
    char freq[MAX_FREQ * 2];
    int i, j;

    fgets(freq, MAX_FREQ * 2, stdin);
    for (i = 0, j = 0; freq[j] != '\n'; i += 1, j += 2) {
        char_freq[i] = atoi(&freq[j + 1]);
    }
}

// 获取输入的文本信息
void get_text(char text[MAX_TEXT]) {
    fgets(text, MAX_TEXT, stdin);
    text[strcspn(text, "\n")] = '\0';  // 去除读入的换行符
}

// 计算文本中字符数
int get_char_count(char *text) {
    return strlen(text);
}

// 计算文本的WPL值
float get_wpl(int char_freq[MAX_FREQ]) {
    int i, total_bits = 0, char_bits = 0;
    float wpl = 0.0;

    for (i = 0; i < MAX_FREQ; i += 1) {
        total_bits += char_freq[i];
    }
    for (i = 0; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > 0) {
            char_bits = (int) (char_freq[i] * (float) (log2(char_freq[i])));
            wpl += (float) char_bits / total_bits;
        }
    }

    return wpl;
}

// 计算每个字符的平均比特数
float get_avg_bits(int char_freq[MAX_FREQ], int char_count) {
    int i, total_bits = 0, char_bits = 0;
    float avg_bits = 0.0;

    for (i = 0; i < MAX_FREQ; i += 1) {
        total_bits += char_freq[i];
    }
    for (i = 0; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > 0) {
            char_bits = (int) (char_freq[i] * (float) (log2(char_freq[i])));
            avg_bits += (float) char_bits / char_count;
        }
    }

    return avg_bits;
}

// 对小段文字进行编码
void encode_text(char *text, int char_freq[MAX_FREQ], char *encoded_text) {
    int i, j, max_freq = 0, freq_size = 0;
    char freq_str[MAX_FREQ][9];

    for (i = 0; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > max_freq) {
            max_freq = char_freq[i];
        }
    }
    sprintf(freq_str[0], "%d", max_freq);
    freq_size = strlen(freq_str[0]);
    for (i = 1; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > 0) {
            sprintf(freq_str[i], "%0*d", freq_size, char_freq[i]);
        } else {
            freq_str[i][0] = '\0';
        }
    }

    j = 0;
    for (i = 0; text[i] != '\0'; i += 1) {
        strcat(encoded_text, freq_str[text[i] - 'a']);
        j += strlen(freq_str[text[i] - 'a']);
    }
}

// 对编码进行译码
void decode_text(char *encoded_text, int char_freq[MAX_FREQ], char *decoded_text) {
    int i, j, k, max_freq = 0, freq_size = 0, freq_count[MAX_FREQ] = {0};
    char freq_str[MAX_FREQ][9], freq_char[MAX_FREQ];

    for (i = 0; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > max_freq) {
            max_freq = char_freq[i];
        }
    }
    sprintf(freq_str[0], "%d", max_freq);
    freq_size = strlen(freq_str[0]);
    for (i = 1; i < MAX_FREQ; i += 1) {
        if (char_freq[i] > 0) {
            sprintf(freq_str[i], "%0*d", freq_size, char_freq[i]);
            freq_char[i] = 'a' + i;
        } else {
            freq_str[i][0] = '\0';
            freq_char[i] = '\0';
        }
    }

    j = 0;
    while (encoded_text[j] != '\0') {
        for (i = 0; i < MAX_FREQ; i += 1) {
            if (strncmp(&encoded_text[j], freq_str[i], freq_size) == 0) {
                decoded_text[k++] = freq_char[i];
                freq_count[i] += 1;
                j += freq_size;
                break;
            }
        }
    }
}

int main() {
    int char_freq[MAX_FREQ] = {0};
    char text[MAX_TEXT] = {'\0'}, encoded_text[MAX_TEXT * 9] = {'\0'}, decoded_text[MAX_TEXT] = {'\0'};
    int char_count;
    float wpl, avg_bits;

    get_char_freq(char_freq);
    get_text(text);
    char_count = get_char_count(text);
    wpl = get_wpl(char_freq);
    avg_bits = get_avg_bits(char_freq, char_count);
    encode_text(text, char_freq, encoded_text);
    decode_text(encoded_text, char_freq, decoded_text);

    printf(":%d\n", char_count);
    printf("WPL=%.2f\n", wpl);
    printf("平均比特数=%.2f\n", avg_bits);
    printf("编码=%s\n", encoded_text);
    printf("译码=%s\n", decoded_text);

    return 0;
}

您可以将上述代码保存为.c文件并在C语言环境中编译运行，输入频次和文本信息即可输出对应的结果。