帮忙解释一下下列的代码

Question

#include
#include
int overflow()
{
char a[1];

    FILE*fp;
    if(!(fp=fopen("C:\\Users\\gg\\Desktop\\1.txt","rw+")))
{
    printf("open failed!\n");
    exit(0);
}
 fscanf(fp,"%s",a);printf("You cannot see it!!!Overflow!\n");

}
int test(char *p)
{
char s[4];
strcpy(s,p);
}
main()
{
char xx[100];
int i=0;
FILE*fp;
if(!(fp=fopen("C:\Users\gg\Desktop\01.txt","rw+")))
{
printf("open failed!\n");
exit(0);
}
fscanf(fp,"%s",xx);
test(xx);
}

Answer 1

一个读文件程序而已，，，，