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  1. #include <stdio.h>
  2. #define MAX 100
  3.  
  4. int isPrime(int n) {
  5.     if(n < 2) return 0;
  6.     for(int i = 2; i <= n/2; i++)
  7.         if(n % i == 0) return 0;
  8.     return 1;
  9. }
  10.  
  11. int main() {
  12.     int n, choice;
  13.     float a[MAX];
  14.  
  15.     printf("Enter n: ");
  16.     scanf("%d", &n);
  17.  
  18.     printf("Enter array:\n");
  19.     for(int i = 0; i < n; i++) {
  20.         scanf("%f", &a[i]);
  21.     }
  22.  
  23.     do {
  24.         printf("\n----- MENU -----\n");
  25.         printf("1. Input array\n");
  26.         printf("2. Print array\n");
  27.         printf("3. Average\n");
  28.         printf("4. Sum positive\n");
  29.         printf("5. Reverse array\n");
  30.         printf("6. Check symmetric\n");
  31.         printf("7. Check increasing\n");
  32.         printf("8. Max even\n");
  33.         printf("9. Delete value x\n");
  34.         printf("0. Exit\n");
  35.  
  36.         printf("Choose: ");
  37.         scanf("%d", &choice);
  38.  
  39.         if(choice == 1) {
  40.             printf("Re-enter array:\n");
  41.             for(int i = 0; i < n; i++) {
  42.                 scanf("%f", &a[i]);
  43.             }
  44.         }
  45.  
  46.         else if(choice == 2) {
  47.             for(int i = 0; i < n; i++)
  48.                 printf("%.2f ", a[i]);
  49.             printf("\n");
  50.         }
  51.  
  52.         else if(choice == 3) {
  53.             float sum = 0;
  54.             for(int i = 0; i < n; i++) sum += a[i];
  55.             printf("Average = %.2f\n", sum/n);
  56.         }
  57.  
  58.         else if(choice == 4) {
  59.             float sum = 0;
  60.             for(int i = 0; i < n; i++)
  61.                 if(a[i] > 0) sum += a[i];
  62.             printf("Sum positive = %.2f\n", sum);
  63.         }
  64.  
  65.         else if(choice == 5) {
  66.             for(int i = 0; i < n/2; i++) {
  67.                 float t = a[i];
  68.                 a[i] = a[n-1-i];
  69.                 a[n-1-i] = t;
  70.             }
  71.             printf("Reversed!\n");
  72.         }
  73.  
  74.         else if(choice == 6) {
  75.             int ok = 1;
  76.             for(int i = 0; i < n/2; i++)
  77.                 if(a[i] != a[n-1-i]) ok = 0;
  78.  
  79.             if(ok) printf("Symmetric\n");
  80.             else printf("Not symmetric\n");
  81.         }
  82.  
  83.         else if(choice == 7) {
  84.             int ok = 1;
  85.             for(int i = 1; i < n; i++)
  86.                 if(a[i] < a[i-1]) ok = 0;
  87.  
  88.             if(ok) printf("Increasing\n");
  89.             else printf("Not increasing\n");
  90.         }
  91.  
  92.         else if(choice == 8) {
  93.             int found = 0;
  94.             int max = -1;
  95.  
  96.             for(int i = 0; i < n; i++) {
  97.                 if((int)a[i] % 2 == 0) {
  98.                     if(!found || a[i] > max) {
  99.                         max = (int)a[i];
  100.                         found = 1;
  101.                     }
  102.                 }
  103.             }
  104.  
  105.             if(found) printf("Max even = %d\n", max);
  106.             else printf("No even number\n");
  107.         }
  108.  
  109.         else if(choice == 9) {
  110.             float x;
  111.             printf("Enter x: ");
  112.             scanf("%f", &x);
  113.  
  114.             int k = 0;
  115.             for(int i = 0; i < n; i++) {
  116.                 if(a[i] != x) {
  117.                     a[k++] = a[i];
  118.                 }
  119.             }
  120.             n = k;
  121.             printf("Deleted!\n");
  122.         }
  123.  
  124.     } while(choice != 0);
  125.  
  126.     return 0;
  127. }
Success #stdin #stdout 0s 5304KB
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stdout
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Enter n: Enter array:

----- MENU -----
1. Input array
2. Print array
3. Average
4. Sum positive
5. Reverse array
6. Check symmetric
7. Check increasing
8. Max even
9. Delete value x
0. Exit
Choose: 1.00 2.00 3.00 4.00 5.00 

----- MENU -----
1. Input array
2. Print array
3. Average
4. Sum positive
5. Reverse array
6. Check symmetric
7. Check increasing
8. Max even
9. Delete value x
0. Exit
Choose:
https://ideone.com/1eQQzl
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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