C 发现个全局变量与局部变量的区别

char** t;

main()

{

char c[1];

char** t1;

sprintf(c,"%d",t);

printf("t=%s---/n",c);

if(strcmp(c,"0")!=0)

{

printf("t is Not Null/n");

}

sprintf(c,"%d",t1);

printf("t1=%s---/n",c);

if(strcmp(c,"0")!=0)

{

printf("t1 is Not Null/n");

}

}