我有一个给定的结构。我读取了txt文件的所有字符,并将其保存到结构中定义的多维数组(行)中。然后,我想将struct变量交给一个函数,该函数应该随后将所有字符打印到另一个txt文件中。
那就是我所拥有的:
typedef struct _content {
int length;
char **lines; // multidimensional array
} content_t;
int curline = 0; //global variables
int curchar = 0;
...
struct _content inhalt;
c = fgetc(ptr);
...
void write_content(char *filename, content_t *content)
{
FILE *pFile;
pFile = fopen(filename, "a");
printf("\nWriting Char Nr. %d in line: %d", curchar, curline);
fputc(content->lines[curline][curchar], pFile);
printf("\nJust wrote char Nr. %d in line: %d !", curchar, curline);
}
...
while(c != EOF)
{
inhalt.lines[curline][curchar] = c;
//where I call the function write_content:
write_content("write-file.txt", &inhalt);
if(c == '\n')
{
inhalt.length++;
curline++;
inhalt.lines[curline] = malloc(255);
curchar = 0;
}
else
{
curchar++;
}
c = fgetc(ptr);
printf("%c", c);
}
最后一个输出是:“刚刚在第22行中写了char Nr。36”
但是写入文件的最后一个字符是第10行的Nr 0 ...
答案 0 :(得分:3)
您正在使用指向结构的指针,因此需要使用fputc(content->lines[curline][curchar], pFile)
。
顺便说一句:如果您的行以null结尾,则可以使用fputs(content->lines[curline], pFile)
@Someprogrammerdude也是正确的,您应该在调用之前定义write_content
。
参考评论:
void write_content(char *filename, content_t *content)
{
FILE *pFile;
pFile = fopen(filename, "a");
for(int line = 0; line <= curline; line++){
for(int c = 0; content->lines[line][c] != 0; c++){ // because 0 terminates the string
printf("\nWriting Char Nr. %d in line: %d", c, line);
fputc(content->lines[line][c], pFile);
}
}
fclose(pFile);
}
// ...
while(c != EOF){
inhalt.lines[curline][curchar] = c;
if (c == '\n')
{
inhalt.lines[curline][curchar+1] = 0; // ensure null termination
inhalt.length++;
curline++;
inhalt.lines[curline] = malloc(255);
curchar = 0;
}
else
{
curchar++;
}
c = fgetc(ptr);
printf("%c", c);
}
//where I call the function write_content:
write_content("write-file.txt", &inhalt);