Question

in c++ Write a program which can find the dot product of two vectors of the same length ?. The user will
enter the length ?. Use the length to control how many times you loop. The result is a scalar value
and not a vector. If the dot product is zero, then the two vectors are perpendicular.

Answer 1

#include <stdio.h>

int main()
{
//declare variable
int length;
float A[10], B[10], dotProduct = 0.0;
  
//display message
printf("Vector Dot Product Calculator.");
printf("\n\nPlease enter the length of the vectors (max 10): ");
scanf("%d", &length);
  
//display message
printf("\nEnter vector A: ");
for(int i=0; i<length; i++)
scanf("%f", &A[i]);
  
//display message
printf("\nEnter vector A: ");
for(int i=0; i<length; i++)
scanf("%f", &B[i]);
  
for(int i=0; i<length; i++)
{
dotProduct = dotProduct + A[i] * B[i];
}
  
printf("\nA = [ ");
for(int i=0; i<length; i++)
{
printf("%.1f ", A[i]);
}
printf("]");
  
printf("\nB = [ ");
for(int i=0; i<length; i++)
{
printf("%.1f ", B[i]);
}
printf("]");
  
//display dot product
printf("\n\nDot Product = %.1f", dotProduct);
  
if(dotProduct==0.0)
{
//display message
printf("\n\nThese vectors are perpendicular.");
}
else
{
//display message
printf("\n\nThese vectors are not perpendicular.");
}
  
return 0;
}