✨ c code for multiplying two 2x2 matrices, with arguments ✨

matrixTimesMatrix.c

#include <stdio.h>                                                                                                                
#include <string.h>                                                                                                               
#include <stdlib.h>                                                                                                               
                                                                                                                                  
int main(int argc, char *argv[]) {                                                                                                
                                                                                                                                  
        // first, making all these variables to use later                                                                         
        float matrix1[4];                                                                                                         
        float matrix2[4];                                                                                                         
        int i;                                                                                                                    
                                                                                                                                  
        char* token;                                                                                                              
        char* rest;                                                                                                               
                                                                                                                                  
        // splitting first arg by ", " and assigning the values to the first matrix
        rest = argv[1];
        i=0;
         
        while ((token = strtok_r(rest, ", ", &rest))) {
                matrix1[i] = atof(token);
                i++;
        }

        // doing it again for the second matrix 
        rest = argv[2];
        i=0;

        while ((token = strtok_r(rest, ", ", &rest))) {
                matrix2[i] = atof(token);
                i++;
        }

        // printing out both matrices 
        printf("\n(%g  %g)  (%g  %g)", matrix1[0], matrix1[1], matrix2[0], matrix2[1]);
        printf("\n(%g  %g)  (%g  %g)", matrix1[2], matrix1[3], matrix2[2], matrix2[3]);
        
        // multiplying them! this is really long so i put it on several lines
        float product[] = {
                (matrix1[0] * matrix2[0]) + (matrix1[1] * matrix2[2]), 
                (matrix1[0] * matrix2[1]) + (matrix1[1] * matrix2[3]), 
                (matrix1[2] * matrix2[0]) + (matrix1[3] * matrix2[2]), 
                (matrix1[2] * matrix2[1]) + (matrix1[3] * matrix2[3])
        };

        // printing out the product of the two matrices
        printf("\n\n _ (%g  %g)", product[0], product[1]);
        printf("\n ¯ (%g  %g)\n", product[2], product[3]);

        return 0;

}