怎样根据不同的输入生成不同的文件

[VR_Lab]

我想根据一个输入m，来生成m个不同的文件，然后给这个文件写入数据，怎样实现打开不同的文件呢，最好是这些文件按编号生成
菜鸟请教哈

[辛鹤]

用gtl022 DE

[sherrik]

没弄明白啥意思

[ouyh12345]

sprintf(str, "%s%d%s", "file", m, ".txt");

[liliangbao]

参考：

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

using namespace std;
  
int main(int argc, char *argv[])
{
    FILE *fp = NULL;
    char szFileName[20] = {0};
    char szFileDir[30] = {0};
    int iNum = 0;    //保存生成的文件数 
    cin>>iNum;   
    
    for(int i = 1;i <= iNum;i++)
    {
        sprintf(szFileName, "%s%d%s", "D:\\file", i, ".txt");
        strcpy(szFileDir, "D:\\");
        strcat(szFileDir, szFileName);
        fp = fopen(szFileName, "wt");
        if(NULL == fp)
        {
            cout<<"生成第"<<i<<"文件失败！"<<endl;
            break;
        }
        fprintf(fp,"%d\n",i);
        fclose(fp);
    }    
  
    system("PAUSE");	
    return 0;
}

[gtl022]

//main.cpp
#include <stdio.h>
#include <stdlib.h>

#define FILENAME_LEN 64

int main()
{
int i, m;
char **filename;
FILE **fp;

printf("Enter m: ");
scanf("%d", &m);

/*malloc mem for filename*/
filename = (char **)malloc(m*sizeof(char *));
if(filename == NULL)
{
printf("malloc error!\n");
return 0;
}
for(i=0; i<m; i++)
{
filename[i] = (char *)malloc(FILENAME_LEN * sizeof(char));
if(filename[i] == NULL)
{
printf("malloc error!\n");
break;
}
sprintf(filename[i], "file%d.txt", i);
}

/*malloc mem for fp*/
fp = (FILE **)malloc(m*sizeof(FILE *));
if(fp == NULL)
{
printf("malloc error!\n");
return 0;
}
for(i=0; i<m; i++)
{
fp[i] = fopen(filename[i], "w");
}

/*do something in file0, begin*/
if(fp[0])
fprintf(fp[0], "This is file0!\n");
/*do something in file0, end*/

/*release mem for filename*/
for(i=0; i<m; i++)
{
if(filename[i])
{
free(filename[i]);
filename[i] = NULL;
}
}
free(filename);

/*close file and release mem for fp*/
for(i=0; i<m; i++)
{
fclose(fp[i]);
fp[i] = NULL;
}
free(fp);

return 1;
}

[gtl022]

//main.cpp
#include <stdio.h>
#include <stdlib.h>

#define FILENAME_LEN 64

int main()
{
	int i, m;
	char **filename;
	FILE **fp;

	printf("Enter m: ");
	scanf("%d", &m);

	/*malloc mem for filename*/
	filename = (char **)malloc(m*sizeof(char *));
	if(filename == NULL)
	{
		printf("malloc error!\n");
		return 0;
	}
	for(i=0; i<m; i++)
	{
		filename[i] = (char *)malloc(FILENAME_LEN * sizeof(char));
		if(filename[i] == NULL)
		{
			printf("malloc error!\n");
			break;
		}
		sprintf(filename[i], "file%d.txt", i);
	}

	/*malloc mem for fp*/
	fp = (FILE **)malloc(m*sizeof(FILE *));
	if(fp == NULL)
	{
		printf("malloc error!\n");
		return 0;
	}
	for(i=0; i<m; i++)
	{
		fp[i] = fopen(filename[i], "w");
	}

	/*do something in file0, begin*/
	if(fp[0])
		fprintf(fp[0], "This is file0!\n");	
	/*do something in file0, end*/

	/*release mem for filename*/
	for(i=0; i<m; i++)
	{
		if(filename[i])
		{
			free(filename[i]);
			filename[i] = NULL;
		}
	}
	free(filename);

	/*close file and release mem for fp*/
	for(i=0; i<m; i++)
	{
		fclose(fp[i]);
		fp[i] = NULL;
	}	
	free(fp);

	return 1;
}

[breezes2008]

来晚了