"Learning the path of iOS: C-language" loop questions

1. Print the graphic shown below:

*

*  *

* * *

The code is as follows:

    for (int i = 0, i < 3; i++) {for            (int j = 2; j > i; j--) {            printf ("");        }       for (int k = 0; k < i + 1; k++) {            printf ("*");        }        printf ("\ n");            }

2. Print out the shape:

*

*   *

*  *  *

*   *

*

The code is as follows:

    for (int i = 0; i < 5; i++) {                if (I < 3) {             //first three lines, that is, first half of the graph is printed out for            (int j = 0; J < 2-i, J + +) {                pri NTF ("");            }            for (int  k = 0; k < i + 1; k++) {                 printf ("*");            }            printf ("\ n");        } else {                       //After two lines, the lower half of the graph for            (int j = 0; J < I-2; J + +) {                printf ("");            }            for (int k = 0; k < 5-i; k++) {                printf ("*");            }            printf ("\ n");}         }     

3. Enter an integer from the console to determine if it is a prime number.

     <span style= "FONT-SIZE:14PX;" >  int n = 0, m = 0;    printf ("Please input a int number:\n");    scanf ("%d", &n);    for (M = 2; m < n; m++) {        if (n% m = = 0  ) {            printf ("Not Prime:%d", n);            break;//end of this layer loop, loop over.        }    } After the loop is over.    if (M = = N) {        printf ("is prime number \ n");    } </span>

Add:

How to remove random numbers in C language:

Stochastic formula: [A, b] a random number in the range of a-a
int n3 = Arc4random ()% (b-a + 1) + A;

4. Randomly generate 20 positive integers [10, 100], output these numbers and the maximum number of them

<span style= "FONT-SIZE:14PX;" >int max = 0;int temp = 0;    for (Int J =0; J <; J + +) {        temp = arc4random ()% +10;                if (Max < temp) {            max = temp;        }            }    printf ("The Max  is%d\n", max);</span>    

5. Program to print out all "daffodils" and print the total number of them. "Narcissus number" is a three-digit number of individual instituted and equal to that integer.

<span style= "FONT-SIZE:14PX;" >   int x = 0;//hundred    int y = 0;//10 digits    int z = 0;//single digit for    (int num = n; num <= 999; num++) {        x = n um/100;        y = num/10%;        z = num%;        if (num = = (x*x*x + y*y*y + z*z*z)) {            printf ("Number of daffodils:%d\n", num);}    } </span>

6. Enter two numbers for greatest common divisor and least common multiple. (In two ways: the Euclidean method and the common method)

<span style= "FONT-SIZE:14PX;" >    int a = 0;    int b = 0;    int Yushu = 0;    printf ("Please intput-numbers: \ n");    scanf ("%d%d", &a, &b);        The Euclidean method    int max = 0, min = 0;    max = a > B? a:b;//Judge ab size and give Max the big value. Most dividend    min = a > b? b:a;//the most divisor.    Yushu = max% min;    while (Yushu! = 0) {        max = min;        min = Yushu;        Yushu = max% min;    }    printf ("Greatest common divisor:%d\n", min);    printf ("Maximum Common multiple:%d\n", (A * b)/min);   Common method for  (int i = 1; I <= min; i++) {if (max% i = = 0 && min% i = = 0) {yue=i;    }} printf ("Greatest common divisor:%d\n", Yue); printf ("Minimum number of conventions:%d\n", (a*b)/yue);</span>

7.find the minimum value in n random numbers

<span style= "FONT-SIZE:14PX;" >    int min = 0, temp = 0, n =0;    printf ("Please intput a number n:\n");    scanf ("%d", &n);    for (int j = 0; J < N; j + +) {        temp = arc4random ()% (15-10 + 1) +;        if (j = = 0) {            min = temp;        } else if (min > Temp) {            min = temp;        }    }    printf ("The Min is%d\n", min);</span>

"Learning the path of iOS: C-language" loop questions