请问main函数的参数在vs2019中如何传入，我想传入的是一个txt文件

Question

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#pragma warning(disable:4996)
#define MAX 30//取决于最长单词长度
#define SIZE 20000//取决于不重复单词个数
typedef struct word {
    char words[MAX];
    int count;
}word;//存放单词及其频数
int first(word* w[], char* single, int n);
void putin(char* str, word* w[], int i, int n);
int handle(FILE* fp, word* w[]);
void Sort(word* w[], int n);
void Swap(word* w1, word* w2);
void show(word* w[], int n);

int main(int argc, char* argv[])
{
    int n, i;//n代表不重复单词的总数 
    FILE* fp;
    word* w[SIZE];

    if (argc == 1)
    {
        printf("No filed name entered, strike any key to exit.\n");
        getchar();
        exit(0);
    }
    if ((fp = fopen(argv[1], "r")) == NULL)
    {
        printf("Cannot open %s.\n", argv[1]);
        getchar();
        exit(1);
    }
    n = handle(fp, w);
    Sort(w, n);
    show(w, n);
    fclose(fp);
    for (i = 0; i < n; i++)
        free(w[i]);

    return 0;
}
int first(word* w[], char* single, int n)
//判断单词是否第一次出现
//返回i代表重复单词在结构体数组中的位置，返回-1代表第一次出现 
{
    int i;
    if (n == 0)
        return -1;
    else
        for (i = 0; i < n; i++)
            if (strcmp(w[i]->words, single) == 0)//strcmp函数用于判断两个字符串是否相等
                return i;

    return -1;
}

void putin(char* str, word* w[], int i, int n)
//将单词存放结构体中 
//首次出现的单词存放进新的数组，重复出现的使对应频数+1 
//n代表不重复单词的总数 
{
    int t = 0;

    if (i == -1)//不重复单词
    {
        while (str[t] != '\0')
        {
            w[n]->words[t] = str[t];
            t++;
        }
        w[n]->words[t] = '\0';
        w[n]->count = 1;
    }
    else//重复单词
        w[i]->count++;
}

int handle(FILE* fp, word* w[])
//将文件中的字符处理成单词（大写将全部转换成小写 
{
    int i = 0, n = 0;
    char ch, bh = 0;//bh用于处理单词中含有单引号的情况 
    char single[MAX] = { 0 };

    while ((ch = fgetc(fp)) != EOF)
    {
        if (!isalpha(ch))//遇到下一个非字母字符后，重置bh
            bh = 0;
        if (isalpha(ch) && bh != 0)//当bh不为零且ch是字母时，说明当前字符处于单引号之后，跳过本次循环
            continue;
        if (!isalpha(ch) && ch != '-')//遇到非字母字符且该字符不为连字符时跳过本次循环
            continue;
        i = 0;
        while (isalpha(ch) || ch == '-')
        {
            if (ch >= 'A' && ch <= 'Z')//将大写字母全部转换成小写字母 
                ch += 32;
            single[i++] = ch;
            ch = fgetc(fp);
        }
        single[i] = '\0';//手动添加'\0' 
        if (ch == '\'')//处理单引号后面的字母序列 
            bh = ch;
        w[n] = (word*)malloc(sizeof(word));
        if (first(w, single, n) == -1)//first函数用于判断single是否第一次出现
            n++;//n代表不重复的单词的总数 
        putin(single, w, first(w, single, n), n - 1);//putin函数用于将该字符串的相关数据保存进w中 
    }

    return n;
}

void Swap(word* w1, word* w2)
//交换两个结构体
{
    word w;
    strcpy(w.words, w1->words);
    w.count = w1->count;
    strcpy(w1->words, w2->words);
    w1->count = w2->count;
    strcpy(w2->words, w.words);
    w2->count = w.count;
}

void Sort(word* w[], int n)
//将单词按频数进行排序
//频数相同的按字典序排序 
{
    int i, j, f;//f作为标志

    for (i = 0; i < n - 1; i++)
    {
        f = 1;
        for (j = 0; j < n - 1; j++)
        {
            if (w[j]->count < w[j + 1]->count)//比较频数
            {
                Swap(w[j], w[j + 1]);
                f = 0;
            }
            else if (w[j]->count == w[j + 1]->count)//频数相同则按字典序排序 
            {
                if (strcmp(w[j]->words, w[j + 1]->words) > 0)//比较字符串大小（字典序），大于0说明前者比后者大
                    Swap(w[j], w[j + 1]);
                f = 0;
            }
        }
        if (f == 1)//f==1说明上述排序已经完成，可提前终止 
            break;
    }
}

void show(word* w[], int n)
//输出
{
    int i;
    for (i = 0; i < n; i++)
        fprintf(stdout, "%d:%s\n", w[i]->count, w[i]->words);
    printf("打印成功！");
}

```

Answer 1

通过cmd控制台调用可执行方案，
按WIN+R，输入cmd点确定，cd exe文件路径，然后输入exe文件名 要加的参数，回车执行