#include <stdio.h>

void error(char *errMsg);

int main(int argc, char *argv[]) {
    if(argc != 2) {
        char errMsg[1024];
        snprintf(errMsg, 1024, "Usage: %s <filename>\n", argv[0]);
        error(errMsg);
    }


    FILE *fl = fopen(argv[1], "r");

    if(fl == NULL) {
        char errMsg[1024];
        snprintf(errMsg, 1024, "Could not open file \"%s\"\n", argv[1]);
        error(errMsg);
    }

    fseek (fl, 0, SEEK_END);
    long size = ftell(fl);
    fclose(fl);

    printf("%s:\n", argv[1]);
    printf("    %.2f Megabytes\n", (double)size/1048576);
    printf("    %.2f Kilobytes\n", (double)size/1024);
    printf("    %d Bytes\n", size);

    return 0;
}

void error(char *errMsg) {
    printf("%s", errMsg);
    exit(0);
}