✨ c code for multiplying a vector by a 2x2 matrix ✨

vectorTimesMatrix.c

#include <stdio.h>                                                                                                                
#include <string.h>                                                                                                               
#include <stdlib.h>                                                                                                               
                                                                                                                                  
int main(int argc, char *argv[]) {                                                                                                
                                                                                                                                  
        // creating variables                                                                                                     
        float vector[4];                                                                                                          
        float matrix[4];                                                                                                          
        int i;

        char* token;
        char* rest;

        // splitting first arg by ", " and assigning the values to the vector
        rest = argv[1];
        i=0;
                       
        while ((token = strtok_r(rest, ", ", &rest))) {
                vector[i] = atof(token);
                i++;
        }

        // doing the same thing for the matrix
        rest = argv[2];
        i=0;
                                        
        while ((token = strtok_r(rest, ", ", &rest))) {
                matrix[i] = atof(token);
                i++;
        }

        // multiplying the matrix and vector 
        float product[] = {
                (vector[0] * matrix[0]) + (vector[1] * matrix[2]),
                (vector[0] * matrix[1]) + (vector[1] * matrix[3])
        };

        // printing it out
        printf("(%g)  (%g  %g) = (%g)\n", vector[0], matrix[0], matrix[1], product[0]);
        printf("(%g)  (%g  %g) = (%g)\n", vector[1], matrix[2], matrix[3], product[1]);

        return 0;

}