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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.    int num;
  5.  
  6.    printf("Enter an integer number smaller than 10: ");
  7.    scanf("%d", &num);
  8.  
  9.    if (num < 4 || num > 9) {
  10.        printf("Enter User input as 4, 7, or 9.\n");
  11.    } else {
  12.        if (num == 4) {
  13.            for (int i = 1; i <= 4; i++) {
  14.                for (int j = 1; j <= 4; j++) {
  15.                    if (i == 1 || i == 4 || j == 1 || j == 4) {
  16.                        printf("*");
  17.                    } else {
  18.                        printf(" ");
  19.                    }
  20.                }
  21.                printf("\n");
  22.            }
  23.        } else if (num == 7) {
  24.            for (int i = 1; i <= 7; i++) {
  25.                for (int j = 1; j <= 7 - i; j++) {
  26.                    printf(" ");
  27.                }
  28.                for (int k = 1; k <= 2 * i - 1; k++) {
  29.                    printf("*");
  30.                }
  31.                printf("\n");
  32.            }
  33.            for (int i = 6; i >= 1; i--) {
  34.                for (int j = 1; j <= 7 - i; j++) {
  35.                    printf(" ");
  36.                }
  37.                for (int k = 1; k <= 2 * i - 1; k++) {
  38.                    printf("*");
  39.                }
  40.                printf("\n");
  41.            }
  42.        } else if (num == 9) {
  43.            for (int i = 1; i <= 9; i++) {
  44.                for (int j = 9; j >= i; j--) {
  45.                    printf("*");
  46.                }
  47.                printf("\n");
  48.            }
  49.            for (int i = 2; i <= 9; i++) {
  50.                for (int j = 1; j <= i; j++) {
  51.                    printf("*");
  52.                }
  53.                printf("\n");
  54.            }
  55.        }
  56.    }
  57.  
  58.    return 0;
  59. }
  60.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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Enter an integer number smaller than 10: Enter User input as 4, 7, or 9.
https://ideone.com/xDks67
language:
C (gcc 8.3)
created:
148 days ago
visibility:
public

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