我尝试使用scanf读取文件名,但失败。我的指针非常糟糕,找不到问题。指向字符串数组的指针有问题吗?这是我的代码:
int* Read_file(char* str[])
{
FILE* fp = fopen(str[1], "r");
if(fp == NULL)
{
printf("File cannot open\n");
return NULL;
}
int rows = 0;
while(!feof(fp))
{
if(fgetc(fp) == '\n')
{
rows ++;
}
}
rows ++;
int* keys = (int*)malloc(3 * rows * sizeof(int));
fseek(fp, 0L, 0);
while(!feof(fp))
{
for(int i = 0;i < rows;i ++)
{
for(int j = 0;j < 3;j ++)
{
fscanf(fp,"%d", &keys[(3 * i) + j]);
}
}
}
fclose(fp);
return keys;
}
int main()
{
char* str[20];
printf("Build_tree ");
scanf("%s",&str);
int* keys = Read_file(str);
return 0;
}
我认为您的代码应该像
int* Read_file(char* str[])
{
FILE* fp = fopen(str, "r");
if(fp == NULL)
{
printf("File cannot open\n");
return NULL;
}
int rows = 0;
while(!feof(fp))
{
if(fgetc(fp) == '\n')
{
rows ++;
}
}
rows ++;
int* keys = (int*)malloc(3 * rows * sizeof(int));
fseek(fp, 0L, 0);
while(!feof(fp))
{
for(int i = 0;i < rows;i ++)
{
for(int j = 0;j < 3;j ++)
{
fscanf(fp,"%d", &keys[(3 * i) + j]);
}
}
}
fclose(fp);
return keys;
}
int main()
{
char str[20];
printf("Build_tree ");
scanf("%s",str);
int* keys = Read_file(str);
//Whatever you want to do with the keys
return 0;
}
对任何查询的评论。