Study day 7

C language

1. Loop control statement

2. Goto statement

   1. Unconditional turn statements

   2. Goto generally forms a circular structure with if statements

   3. int	a = 1, sum = 0;
      	tiao:
      	if (a <= 200)
      	{
      		sum = sum + a;
      		a++;
      		goto tiao;
      
      	}
      	printf("%d", sum);

   4. Goto — cannot be used across functions

   5. Jumping from inside the circulatory system to outside the circulatory system will destroy the principles of structured programming

3. Statement while

   1. While: judge first and then execute. When the type of loop structure

   2. int	a = 1, sum = 0;
      	while (a <= 200)
      	{
      		sum = sum + a;
      		a++;
      	}
      	printf("%d", sum);
      //The effect is the same as goto statement

   4. 、

4. Do while statement

   1. Until the loop statement, – do while

   2. int	a = 1, sum = 0;
      	do
      	{
      		sum = sum + a;
      		a++;
      	} 
      	while (a <= 200);
      	printf("%d", sum);

   4. Execute first and then judge