错误 1 error C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. d:usersvs2013le

#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>
#include<stdlib.h>

void main()
{
    int num;
    scanf("%d", &num);

    char str[50];

    sprintf(str,"for /l %%i in (1,1,%d) do @echo china",num);

    system(str);

    system("pause");
}

#define _CRT_SECURE_NO_WARNINGS 关闭安全检查