这是我的代码：
char delims[4];
delims[0]='\t';
delims[1]=' ';
delims[2]=',';
delims[3]='\0';
i = 0;
while (fgets(line, 10000, fp) != NULL)
{
result = strtok(line,delims);
while(result != NULL) {
(*data_array)[i++] = atof(result);
result = strtok(NULL, delims);
}
}
够直截了当。它适用于以下文件：
3.600000 79.000000
1.800000 54.000000
3.333000 74.000000
2.283000 62.000000
4.533000 85.000000
2.883000 55.000000
4.700000 88.000000
但它不适用于此文件：
3.6 79 3
1.8 54 3
3.333 74 3
2.283 62 1
4.533 85 1
2.883 55 1
4.7 88 2
3.6 85 1
1.95 51 1
4.35 85 3
我收到“中止（核心转储）”错误。我究竟做错了什么？
编辑：这是整个功能。*data_array 和 *data_labels 刚刚在 main() 中声明。我注释掉了一些 data_labels 部分，这样我就可以让第一部分工作：
int getdata(double* *data_array, int* *data_labels, int argc, char *argv[], int *items, int *attr)
{
// filename variables
char *filename; // pointer to a string that will contain the name of the training data file.
char *result = NULL; // used with strtok() to extract each feature value given a line of delimited features.
FILE *fp; // pointer to FILE, we can use this with fgets to access each line
char line[10000]; // array of 1000 chars for storing the raw data for one observation
char delims[4]; // an array of common delimiters for data files
delims[0]='\t';
delims[1]=' ';
delims[2]=',';
delims[3]='\0';
int i, j;
// check that we have the correct number of command line arguments
if (argc < 2)
{
printf("2usage: progname filename\n");
return -1;
}
if (argc < 4)
{
printf("3usage: progname filename num_labels k(nn)\n");
return -1;
}
if (atoi(argv[2]) < 1)
{
printf("num_labels must be a positive integer.\n");
return -1;
}
if (atof(argv[2]) - atoi(argv[2]) > 0)
{
printf("num_labels must be an integer.\n");
return -1;
}
if (atoi(argv[3]) < 1)
{
printf("k must be a positive integer.\n");
return -1;
}
if (atof(argv[3]) - atoi(argv[3]) > 0)
{
printf("k must be an integer.\n");
return -1;
}
// try to open the file
filename = argv[1];
fp = fopen(filename, "r");
if (fp == NULL)
{
printf("could not open file: %s\n", filename);
printf("note: the filename should be the second command line argument, after the .exe file");
return -1;
}
printf("reading file: %s\n", filename);
// get first line of the file to get num_items and num_attrs.
fgets(line, 1000, fp);
sscanf(line, "%d \t %d", items, attr);
printf("num items: %d\n", *items);
printf("num attributes: %d\n", *attr);
if (atoi(argv[3]) > *items)
{
printf("k should be smaller than the number of items in the input file.\n");
return -1;
}
// create an array of the data
*data_array = malloc(*items* *attr*sizeof(double));
*data_labels = malloc(*items*sizeof(int));
printf("data array size = %d\n\n",*items* *attr);
i=0;
j=0;
while (fgets(line, 10000, fp) != NULL)
{
// we break line into tokens using our delimeters list declared at the beginning of the function
result = strtok(line,delims);
//printf("%d\n",i);
while(result != NULL) {
(*data_array)[i++] = atof(result);
//printf("%f\n",(*data_array)[i-1]);
result = strtok(NULL, delims);
}
//(*data_labels)[j++] = (int)((*data_array)[--i]);
}
/*
printf("j=%d,items=%d\n",j,*items);
for (i=0;i<*items;i++)
{
printf("i=%d,items=%d,",i,*items);
printf("label=%d\n",(*data_labels)[i]);
}
// close the file
fclose(fp);
return 0;
}