C语言之_指针数组、结构体、动态内存分配

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

return 0;

}

2、指针数组
整型数组 int a[20];

int a=10;
int b=20;
指针数组 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、字符串函数
strlen 和 sizeof 的区别

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