Question

Create a C project named login_l03t1. Create an array of int from parameters passed on the command line. Use argc to define the size of the array. Print the contents of the array in the format and Generate and print the total of the values in the array twice: once by using an index i, and a second time by incrementing a pointer to the array.

I need help with this please! what I have done is below:

int n = 5;
    double value = 33.5;
    data[n] = value;
    printf("Value at index %d is %lf\n", n, data[n]);

   int size = 0;
    printf("Enter size: ");
    scanf("%d", &size);
    // Create an array of 'size' integers:
    int numbers[size];
    printf("Enter %d values: ", size);
    
    for (i = 0; i < size; i++) {
        scanf("%d", &numbers[i]);
    }
    for (i = 0; i < size; i++) {
        printf("numbers[%d]: %d\n", i, numbers[i]);
    }

Answer 1

#include<stdio.h>
#include<stdlib.h>
//command line arguments, argc is the argument count and argv[] is the value of the arguments
int main(int argc,char *argv[])
{
int n,arr[100],i,j,*p;//declare the variables and array with size 100

if(argc!=2) //check for validity of command, In this program the value of argc must be 2 because 1 will be the command name(filename) and second is the size of array
{
printf(" INVALID COMMAND OR FILE NAME");
exit(0);
}
n=atoi(argv[1]); //assign the size of array to n
for(i=0;i<n;i++) //loop to input the n elements into the array
{
printf(" Enter a number");
scanf("%d",&arr[i]); //input the elements and stores them in the array
}
//display the array elements using i variable
printf(" THE ARRAY ELEMENTS ARE :");
for(i=0;i<n;i++)
printf(" Value at index %d is %5d",i,arr[i]);
p=&arr[0]; //assign the address of first element of array to pointer p
printf(" THE ARRAY ELEMENTS THROUGH POINTERS :");
//display the elements using the pointer variable
for(i=0;i<n;i++)
printf(" Value at index %d is %5d",i,*p++); //display the elements of array through pointer
}

OUTPUT

NOTE: SAVE THE FILE AS login_I03t1.c

now open the command prompt. SET THE directory to the location of file.

Then type the filename size of array