1. Ask for the size of an array;
2. Create a one-dimensional array;
3. Fill arrays with a random number between -6 and 6;
4. Calculate and display the average value of all numbers in an array;
5. Find and display the largest number from an array.

I'm new to C and can't solve the task. If it's possible can you guys help or give some hints

#include <stdio.h> 
int main() 
{ 
    int size=0; 
    int arr[size]; 
    printf("input size of array "); 
    scanf("%d",&size); 
    printf("\none - dimensional of array: "); 
    for(int i=0;i<size;i  ){ 
        scanf("%d",&arr[i]); 
    } 
    printf("\nThe array  is "); 
    for(int i=0;i<size;i  ){ 
        printf("%d",arr[i]); 
    } 
    return 0; 
}

CodePudding user response：

#include <stdio.h> 
int main() 
{ 
    int max = INT_MIN; //variable to get the maximum number in the array
    int avg = 0, sum = 0;
    int size=0; 

    //Ask for size of the Array before initializing
    printf("input size of array "); 
    scanf("%d", &size); 

    //Create the Array
    int arr[size];

    printf("\none - dimensional of array: "); 

    //Use rand(), to get a random number between 0 and INT_MAX
    //Then modulo the value of the random int by 13 to scale the value between [0, 12]
    //subtract by 6 to get a range of [-6,6]
    for(int i=0;i<size;i  ){ 
        int random = rand();
        random = random % 13;
        random = random - 6;
        arr[i] = random; 
    } 

    printf("\nThe array  is "); 
    for(int i=0;i<size;i  ){ 
        printf("%d",arr[i]); 
    } 

    //Get average of all elements, and the element with the maximum value
    for(int i=0;i<size;i  ){ 
        if(max < arr[i])
            max = arr[i];
        ums  = arr[i]; 
    } 
    avg = sum/size;

    printf("\nAverage: %d", avg);
    printf("\nMaximum: %d", max);
    return 0; 
}

CodePudding user response：

You should ask for the size before the array declaration

int size=0; 
printf("input size of array "); 
scanf("%d",&size);
int arr[size];

For random you could use the rand() function from stdlib.h to generate the elements, but you need to scale to -6 and 6 because the rand only generates values in the inclusive range [0, RAND_MAX]. (RAND_MAX is INT_MAX)