初识函数、数组

int main()
{
       int num1 = 0;
       int num2 = 0;
       scanf("%d %d", &num1, &num2);
       int sum = num1 + num2;
       printf("%dn", sum);
       return 0;
}

函数的方式

Add(int x,int y)
{
       int z = 0;
       z = x + y;
       return z;
}
int main()
{
       int num1 = 0;
       int num2 = 0;
       scanf("%d %d", &num1, &num2);
       //函数的方式解决
       int sum=Add(num1, num2);
       printf("%dn", sum);
       return 0;
}

int main()
{
       int a = 1;
       int b = 2;
       int c = 3;
       int d = 4;
       //...
       //数组
       //10个整型1-10存起来
       //数组是用下标来访问的
       int arr[10] = { 1,2,3,4,5,6,7,8,9,10 };
       //规定第一元素下标为0，以此类推，最后一个元素下标为9
       int i = 0;
       while (i < 10)
       {
               printf("%dn", arr[i]);
               i++;
       }
       char ch[5] = { 'a','b','c' };//不完全初始化，剩余的默认为0
       return 0;
}