C语言结构体的赋值与输出

#include <stdio.h>
typedef struct _book
{
      char name[50];
      char author[30];
      float price;
      int num;
}book;

int main()
{
    book b;
    strcpy(b.name,"C programming");
    strcpy(b.author,"Tony");
    b.price = 38.5;
    b.num=6;
    printf("%s,%s,%g,%d",b.name,b.author,b.price,b.num);
    return 0;
}