1、sizeof()
int main()
{
int a[20];
int count=sizeof(a)/sizeof(int);
printf(“%d\n”,count);

return 0;

}

2、指標陣列
整型陣列 int a[20];

int a=10;
int b=20;
指標陣列 int *a[20]={&a,&b};

char c=’m’;
char d=’n’;

char b[20]=”hello”;
char *b[20]={&c,&d};

char *argv[]={“hi”,”sunhong”};

3、字串函式
strlen 和 sizeof 的區別

include

include

include

include

include

include

include

include

include

include

include

include