Question

I m 有一个简单的C方案。即使我进入了1 000至1999年的一年,它仍然显示无效。请告诉我发生了什么?

#include <stdio.h>

main()
{
    int year;
c:
    printf("

Enter a Year: ");
    scanf("%d", year);

    if ((year < 1000) || (year > 1999))
    {
        printf("

Invalid Year");
        goto c;
    }
    convert(year);

}
convert(int year)
{
    printf("%d", year);
}

Answer 1

页: 1

scanf("%d", &year);

注

Answer 2

in scanf, the other parameters should be pointers
it should be

  scanf("%d", &year);

Answer 3

Adam Zalcman beat me to it, use scanf("%d", &year), and try to avoid goto statements. Replace it with a while loop in the following fashion:

main() {
  int year;
  printf("

Enter a Year: ");
  scanf("%d", &year);

  while((year < 1000) || (year > 1999)) {
    printf("

Invalid Year");
    printf("

Enter a Year: ");
    scanf("%d", &year);
  }
}

建造更佳的工程是利用“i”工程,但我把工程留给你做为:

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