Side effects and sequence points

Side effects and sequence points

side effect : It is the modification of data objects or files

Sequence point : Is the point where the program is executed , In this e-commerce , All side effects occur before moving on to the next step . stay C In language , The semicolon in the statement marks a sequence point .

index = 0;
while (index++ < 10)
	sam = 10 * index + 2;
printf("sam = %d\n",sam);

index = 0;
while (index++ < 10)
{
	sam = 10 * index + 2;
	printf("sam = %d\n",sam);
}

The first procedure printf() Only once , Different from the second procedure .