In C programming, how to make the computer randomly output an integer of 1 9

c language. , to obtain pseudo-random numbers.

The srand() and rand() functions are mainly used.

The rand() function returns a pseudorandom number, but this is done mathematically.

The calculated random number distribution is too concentrated, so the srand() function should be used to set the seed that generates the random number, and the current time is generally used as the seed, so that the pseudo-random number with a relatively uniform distribution can be obtained.

rand(), srand() functions are located at.

In the file, the time() function to get the time is located in the file. The random number test is as follows:

include

include

include

voidmain()

intresults[10];*Used to save the result of random number generation* inti=0;

srand((int)time(0));*set seed* for(i=0; i<10;i++)

results[i]=0;

for(i=0;i<10000;i++)

results[rand()%10])+ * take a random number 10,000 times and use the remainder operator.

So that the final random number obtained is less than 10*

for(i=0;i<1

0;i++)

printf("dd

n",i,results[i]);*Outputs the number of occurrences of a random number between 0-9*

After many run tests, the random number produced is relatively uniform.

The rand() function will return a pseudo-random number, but this is calculated by a mathematical formula, and the distribution of the obtained random number is too concentrated, so the srand() function should be used to set the seed that generates the random number, and the current time is generally used as the seed, so that a pseudo-random number with a relatively uniform distribution can be obtained.

The rand(), srand() functions are located in the file, and the time() function to get the time is located in the file. rand()%9+1；

rand()%9

Generate a random number of 0 8;

rand()%9+1 Random number of 1 9;

1. First of all, you need to define a max minimum variable.

2. Then give the value of the first address to the minimum value.

3. Next, you can start to make a convenient search.

4. If the number is greater than the maximum value, it can be automatically replaced.

5. Then you can output the minimum value.

6. Then after running, you can see the minimum value displayed on the screen.

1. First of all, you need to define a max minimum variable.

2. Then give the value of the first address to the minimum value.

3. Next, you can start to make a convenient search.

4. If the number is greater than the maximum value, it can be automatically replaced.

5. Then you can output the minimum value.

6. Then after running, you can see the minimum value displayed on the screen.

main()

for(i=i;iprintf("The smallest of the n numbers is: %d",shuzu[k]);

printf("The smallest number is the %d number",k);}

If you say how many you want to count, if you do, it's simple.

#include

int main()

for(d=0;d<=n;d++)

return 0;}

Idea: 2-digit integer, divisible.

2 gets a number of ten digits, and dividing by 10 gives a single digit. Cycle through the integer of 1 100 and judge the sum of its ten digits and single digits.

If the filtered data is not considered for storage, the printout is judged directly in the loop.

If you want to store the data, print it in a loop, and define the array storage.

Below ** (the integers that are satisfied by the filter are stored in the array):

#include <

int main()

int i,num[100],g,s;

for(i=1;i<=100;i++)

num[i-1]=i;

g=i%10;Bit.

s=i/10;Ten bits.

if(g+s==3)

printf("The addition of the digits to the digits %d is equal to 3, skip! ",i),num[i-1]=-1;

printf("All remaining numbers are:");

i=100;

while(i>0)

if(num[100-i]!=-1)

printf("%d ",num[100-i]);

i--;return 0;

There's nothing wrong with the program, but it just doesn't indicate its maximum position. It should be: