fscanf读csv为什么读出来全是0

[Dee1997]

int main()
{
	
	FILE *fp;
	if(fopen_s(&fp,"F://datastructure//data//node.csv","r")!=0) {  
		printf("File cannot be opened/n");  
	}  
	else  
	{
		
		while(1)
		{
			int num=0;
			double vx=0,vy=0;
			int joincount=0;
			if(fscanf(fp,"%d,%lf,%lf,%d",&num,&vx,&vy,&joincount)==-1) break;
			printf("%d,%lf,%lf,%d\n",num,vx,vy,joincount);
			cout<<num<<":"<<"("<<vx<<","<<vy<<")"<<joincount<<endl;/
		}
		
	}
		fclose(fp);   
	return 0;
}

[赵4老师]

注意文件编码： In Visual C++ 2005, fopen supports Unicode file streams. A flag specifying the desired encoding may be passed to fopen when opening a new file or overwriting an existing file, like this: fopen("newfile.txt", "rw, ccs=<encoding>"); Allowed values of the encoding include UNICODE, UTF-8, and UTF16-LE. If the file is already in existence and is opened for reading or appending, the Byte Order Mark (BOM) is used to determine the correct encoding. It is not necessary to specify the encoding with a flag. In fact, the flag will be ignored if it conflicts with the type of the file as indicated by the BOM. The flag is only used when no BOM is present or if the file is a new file. The following table summarizes the modes used in for various flags given to fopen and Byte Order Marks used in the file. Encodings Used Based on Flag and BOM Flag No BOM (or new file) BOM: UTF-8 BOM: UTF-16 UNICODE ANSI UTF-8 UTF-16LE UTF-8 UTF-8 UTF-8 UTF-16LE UTF-16LE UTF-16LE UTF-8 UTF-16LE

[www_adintr_com]

F://datastructure//data//node.csv => F:\\datastructure\\data\\node.csv

[Dee1997]

引用 1楼www_adintr_com 的回复:

F://datastructure//data//node.csv => F:\\datastructure\\data\\node.csv

好像不是这个原因… 改了也不行

[自信男孩]

是不是node.csv文件格式不是格式化的？ fscanf是格式化的读取。

[赵4老师]

请判断fscanf函数的返回值。

[versatts]

以文本方式打开试试

[Dee1997]

引用 4楼赵4老师 的回复:

请判断fscanf函数的返回值。

判断了fscanf==-1 break 这样不可以吗…

[Dee1997]

引用 5楼versatts 的回复:

以文本方式打开试试

也不行…

[Dee1997]

引用 3楼自信男孩 的回复:

是不是node.csv文件格式不是格式化的？ fscanf是格式化的读取。

这个我也不懂… 是老师给的 那应该是没问题的吧…

[qq_22933199]

你的fp定义为指针，后面又加取地址干嘛