c语言获取当前项目路径的文件

Posted 2023-05-18

参考技术A /*从字符串的左边截取n个字符*/

char * left(char *dst,char *src, long n)



    char *p = src;

    char *q = dst;

    int len = strlen(src);

    if(n>len) n = len;

    /*p += (len-n);*/  /*从右边第n个字符开始*/

    while(n--) *(q++) = *(p++);

    *(q++)='\0'; /*有必要吗？很有必要*/

    return dst;



int substr(char *s1, char *s2)



    char *s3 = strstr(s1,s2);

    if(s3 == NULL)

          return -1;

    return strlen(s1)-strlen(s3);



char* mysubstr(char* srcstr, int offset, int length)

    int total_length = strlen(srcstr);

    int real_length = ((total_length - offset) >= length ? length : (total_length - offset)) + 1;

    char *tmp;

    if (NULL == (tmp=(char*) malloc(real_length * sizeof(char))))

        printf("Memory overflow . \n");

        exit(0);

   

    strncpy(tmp, srcstr+offset, real_length - 1);

    tmp[real_length - 1] = '\0';

    return tmp;



#define ENCODE 1

#define IN_PCM(a) strcat(a,"/file/input.pcm")

#define OUT_SPX(a) strcat(a,"/file/out.spx")

#define OUT_PCM(a) strcat(a,"/file/out.pcm")

int main(int argc, char **argv)

    char* path;

    char* dist;

    path = argv[0];

    char* index =  strstr(path,PROJECT_PATH);

    long diff = index-path;

    char *pathDir = mysubstr(path,0,substr(path,PROJECT_PATH)+9);

    // 创建一个字符串数组

    char arr1[64] = 0;

    strcpy(arr1, pathDir);

    char arr2[64] = 0;

    strcpy(arr2, pathDir);

    char* temp0=IN_PCM(pathDir);

    char* temp=OUT_SPX(arr1);

    char* tempOut=OUT_PCM(arr2);

    // 创建一个字符串数组

    char arr0[64] = 0;

    strcpy(arr0, temp0);

    printf("after arr0=%s\n,arr1=%s\n,arr2=%s\n",arr0,arr1,arr2);

    return 0;

c语言读取文件的路径怎么设定

有如下程序，运行后输入路径即可读取文本文件，现在我想让他实现读取和程序在同一目录下的文件student.dat，请问怎么改？#include <stdio.h>
#include <stdlib.h>#define LINE 1024char *ReadData(FILE *fp, char *buf)

return fgets(buf, LINE, fp);//读取一行到buf
void someprocess(char *buf)

printf("%s", buf);
void main()

FILE *fp;
char *buf, filename[20], *p; printf("input file name:");
gets(filename);

if ((fp=fopen(filename, "r"))==NULL)
printf("open file error!!\n");
return;
buf=(char*)malloc(LINE*sizeof(char)); while(1)
p=ReadData(fp, buf);//每次调用文件指针fp会自动后移一行
if(!p)//文件读取结束则跳出循环
break;
someprocess(buf);

//获取指定目录下的所有文件列表 author:wangchangshaui jlu
char** getFileNameArray(const char *path, int* fileCount)

int count = 0;
char **fileNameList = NULL;
struct dirent* ent = NULL;
DIR *pDir;
char dir[512];
struct stat statbuf;

//打开目录
if ((pDir = opendir(path)) == NULL)

myLog("Cannot open directory:%s\n", path);
return NULL;

//读取目录
while ((ent = readdir(pDir)) != NULL)
//统计当前文件夹下有多少文件（不包括文件夹）
//得到读取文件的绝对路径名
snprintf(dir, 512, "%s/%s", path, ent->d_name);
//得到文件信息
lstat(dir, &statbuf);
//判断是目录还是文件
if (!S_ISDIR(statbuf.st_mode))

count++;

//while
//关闭目录
closedir(pDir);
// myLog("共%d个文件\n", count);

//开辟字符指针数组，用于下一步的开辟容纳文件名字符串的空间
if ((fileNameList = (char**) myMalloc(sizeof(char*) * count)) == NULL)

myLog("Malloc heap failed!\n");
return NULL;


//打开目录
if ((pDir = opendir(path)) == NULL)

myLog("Cannot open directory:%s\n", path);
return NULL;

//读取目录
int i;
for (i = 0; (ent = readdir(pDir)) != NULL && i < count;)

if (strlen(ent->d_name) <= 0)

continue;

//得到读取文件的绝对路径名
snprintf(dir, 512, "%s/%s", path, ent->d_name);
//得到文件信息
lstat(dir, &statbuf);
//判断是目录还是文件
if (!S_ISDIR(statbuf.st_mode))

if ((fileNameList[i] = (char*) myMalloc(strlen(ent->d_name) + 1))
== NULL)

myLog("Malloc heap failed!\n");
return NULL;

memset(fileNameList[i], 0, strlen(ent->d_name) + 1);
strcpy(fileNameList[i], ent->d_name);
myLog("第%d个文件:%s\n", i, ent->d_name);
i++;

//for
//关闭目录
closedir(pDir);

*fileCount = count;
return fileNameList 参考技术A "student.dat",或者直接设定它的路径,比如在C盘WINDOWS下就是:"C:\\WINDOWS\\student.dat"注意要多加\,也就是说是\\