练习1.13

最新推荐文章于 2020-03-29 00:09:18 发布

原创最新推荐文章于 2020-03-29 00:09:18 发布 · 644 阅读

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编程：打印输入中单词长度的水平方向的直方图。

代码：

#include <stdio.h>
#include <ctype.h>
#define MAXLEN 30
#define WORD_TABLE_LEN 30

void printWordTable(FILE *fin, FILE *fout);

int main(int argc, char *argv[])
{
    printWordTable(fopen("main.c", "r"), stdout);
    return 0;
}

void printWordTable(FILE *fin, FILE *fout)
{
    char inword = 'n';
    size_t wordTable[WORD_TABLE_LEN];
    for (size_t i = 0; i != WORD_TABLE_LEN; ++i)
        wordTable[i] = 0;
    int c;
    size_t len = 0;
    while ((c = fgetc(fin)) != EOF) {
        if (inword == 'y') {
            if (isalnum(c)) {
                ++len;
                continue;
            } else {
                ++wordTable[len];
                inword = 'n';
                len = 0;
                continue;
            }
        } else {
            if (isalnum(c)) {
                ++len;
                inword = 'y';
                continue;
            } else {
                continue;
            }
        }
    }

    for (size_t i = 0; i != WORD_TABLE_LEN; ++i) {
        if (i%10 == 0)
            fprintf(stdout, "\n");
        fprintf(stdout, "%ld ", wordTable[i]);
    }
    fprintf(stdout, "\n\n");

    size_t maxCount = 0;
    for (size_t i = 0; i != WORD_TABLE_LEN; ++i)
        if (wordTable[i] > maxCount)
            maxCount = wordTable[i];
    while (maxCount != 0) {

        for (size_t i = 0; i != WORD_TABLE_LEN; ++i) {
            if (wordTable[i] == maxCount) {
                --wordTable[i];
                fprintf(stdout, "* ");
            } else {
                fprintf(stdout, "  ");
            }
        }
        fprintf(stdout, "\n");
        maxCount = 0;
        for (size_t i = 0; i != WORD_TABLE_LEN; ++i) {
            if (wordTable[i] > maxCount)
                maxCount = wordTable[i];
        }
    }
}

难道我应该加一点注释。。。。这个程序的确不好看明白。。。以后要画流程图了。。。