Question

NOT C++

Write a C function named dot_product to calculate the dot product of two vectors based on Formula 1. In the main C function, prompt the user to input two vectors, then call the function dot_product to find the dot product of those two inputted vectors. Remember to print out the result of the dot product.

Answer 1

Answer:

#include<stdio.h>
int dot_product(int a[],int b[],int n) // function definition which takes the arguments as two vectors a, b, and number of elements n in the vectors
{
   int i,dp=0; // i is a counter variable, and dp is the variable to hold the dot product (i and dp are different from i and dp of main()
   for(i=0;i<n;i++)
   {
       dp=dp+(a[i]*b[i]); // calculating dot product dp by multiplying ith element of vector a and ith element of vector b
   }
return dp; //returning the value of dp to main() function
}
int main()
{
   int a[10],b[10];// a, b are the arrays to store the vector elements
   int i,dp,n; // i is a counter variable, n is the number of elements of the arrays, and dp is the variable to hold the dot product
   printf("Enter the number of elements of the vector:");
   scanf("%d",&n); // read the value of n i.e elements of arrays
   printf("Enter the elements of vector a\n");
   for(i=0;i<n;i++)
   {
       scanf("%d",&a[i]); // taking the elements into array a
   }
   printf("Enter the elements of vector b\n");
   for(i=0;i<n;i++)
   {
       scanf("%d",&b[i]); // taking the elements into array b
   }
   dp=dot_product(a,b,n); // call to the function dot_product() by passing the arguments array a, array b, and number of elements n
   printf("The dot product of two vector is:%d",dp); // printing the dot product value dp
   return 0;
}​

Output:

CAUsersiakiDesktopALNAvector.exe Enter the number of elements of the vector:3 Enter the elements of vector a 1 2 3 Enter the elements of vector b 4 5 6 The dot product of two vector is:32 Process exited after 18.07 seconds with return value0 Press any key to continue . . .

」C:\UsersiakDesktop.LMvector.exe Enter the number of elements of the vector:4 Enter the elements of vector a 3 -1 25 Enter the elements of vector b The dot product of two vector is:11 Process exited after 135.6 seconds with return value0 Press any key to continue