Ask me a question about the sequential points in C

struct point

double x;

double y;

main()

vectorpoints;This is an ordered set of points.

Didn't understand, add to it.

Algorithm of the choice method:

Suppose you need to sort 10 numbers, then first find the smallest number in the 10 numbers, and swap places with the first (subscript 0) of the 10 numbers, leaving 9 numbers (these 9 numbers are larger than the number just selected), and then select the smallest number of these 9 numbers, and exchange them with the number of the second position (subscript 1), so there are 8 numbers left (these 8 numbers are larger than the ones just selected).

And so on, when there are two numbers left, the lowest of the two numbers is selected and placed in the 9th position (subscript 8), so that only one number remains. This number is already in the last digit (subscript 9), so there is no need to choose again. Therefore, for 10 number sorting, you need to select a total of 9 times (n number sorting needs to be selected n-1 time).

Create a button inside the div with the id of container, you can use: ; register a handler for the click event of the div with the id of container, using: , handlerfn, scope);

If this function is executed, elements in the a-array that are smaller than a[0] will be lost. Because in the loop a[j+1]=a has no chance to execute.

The function is modified as follows:

The original A array has the least running time when ascending. a[10]=The original A array has taken the most time to run in descending order. a[10]=

Almost all programming languages, including C, have three basic program structures: sequential structures, selection structures, and loop structures.

Sequential structure. The sequential structure is to execute statements one by one from top to bottom, all statements will be executed, and the executed statements will not be executed again.

For example, if you find the sum of 1+2+3+4+5, you can add them up one by one.

Select the structure. The choice structure is to determine which statements to execute according to the conditions, and if the given conditions are true, the corresponding statements are executed, and if not, some other statements are executed.

For example, output different content based on the age of the user input:

Age Under 18 You are still underage and should study hard.

Greater than or equal to 18, less than or equal to 30 Cherish youth and do more beneficial things.

More than 30, less than 60 social backbone, pay attention to the body while working.

60 or more Please enjoy your old age and we will remember your contribution to society.

The user enters the age, and the program will make a judgment and output different content according to different ages. Of these four output statements, only one is executed, and the other three are skipped and not executed.

Circular structure. A loop structure is the repetition of certain statements before a specified condition is reached.

For example, the calculation 100!, s3 and s4 will be repeated.

Finally, we use a double loop structure to output the ninety-nine multiplication table:

#include

int main(){

int i, j;

for(i=1; i<=9; i++)

for(j=1; j<=i; j++)

printf("%-3d ", i*j);-3d is the output integer, with a width of 3 (accounting for 3 characters), left-aligned.

printf("");

return 0;

That's right. The answer is sequential structure, choice structure, cyclic structure.

This is 3 numbers to sort by.

First, enter the three numbers a, b, and c

if(a>b) when a is greater than b.

A and B exchange.

if(a>c) when a is greater than c.

A and C exchange.

if(b>c) when b is greater than c.

B and C are exchanged.

First, a third variable is used to swap two numbers.

t=a;a=b;

b=t;Suppose a=1, b=2

t=a;//t=1

a=b;//a=2;

b=t;//b=1

Final Result. a=2,b=1 so ab exchange takes place.

3 more judgments.

Add a=5, b=4, c=3

First judgment.

A>bab exchange.

So a=4, b=5, c=3

Second judgment.

a>CAC exchange.

So a=3, b=5, c=4

Third judgment.

b> CBC exchange.

So a=3, b=4, c=5

This sorts you.

**： #include

void main ()

Photo: I hope it helps.