Question

C语言读取文件里的小数的问题

FILE *fileout;
char test_char[123];
double price;

fileout = fopen("weather","r");

if(fileout == NULL)
{
printf("open file false\n");
return 0;
}

fprintf(stderr,"file out = %s\n",test_char);

while(fscanf(fileout,"%f"&price)!=EOF);
printf("%5.5f\n",price);
fclose(fileout);
return 0

程序老报错。。不知道那里有问题呢，while(fscanf(fileout,"%f"&price)!=EOF);这一句读取数字是按书上说的写的啊

Answer 1

while(fscanf(fileout,"%f"&price)!=EOF);

(1)漏了逗号，(2) double price 要用格式 %lf (Long Float):
while(fscanf(fileout,"%lf",&price)!=EOF);

printf("%10.5lf\n",price);

Answer 2

while(fscanf(fileout,"%f",&price)!=EOF);