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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(int argc, char *argv[]) {
/* intro */
printf("\nWarning: In order for this calculator to work properly, you must use kg for mass and m/s2 for velocity.\n\n");
printf("(The order is: m, v)\n\n");
/* variables */
double mass, vel, result;
if (argc != 3) {
printf("Invalid arguments.\n");
return -1;
}
/* converting arguments to float */
mass = atof(argv[1]);
vel = atof(argv[2]);
/* km to m/s */
vel = vel * 1000 / 3600;
/* final calculation (½ m * v² = x quantity of joules) */
result = (0.5 * mass * pow(vel, 2));
/* print of results */
printf("The result is: %6.2fJ", result);
return 0;
}