btmills / calculator Goto Github PK

void usage(char * pname)
{
    printf("Usage: %s [option]\n", pname);
    printf("option:\n");
    printf("\t-r\t no print prefix '='\n");
    printf("\t-m N\t maximum token length\n");
    printf("\t-p N\t set precision to X decimal places (-1 = auto)\n");
    printf("\t-h\t this help\n");
    printf("spec command:\n");
    printf("\tget/set\t read or change the value of a setting\n");
    printf("\tdisplay {postfix | tokens} (off/on)\t display the postfix stack | the result of tokenization\n");
    printf("\tmode (radians/degrees) \t evaluation mode of trigonometric functions\n");
    printf("\tprecision (X/auto)\t set precision to X decimal places\n");   
    printf("\thelp\t this help\n"); 
    printf("\tquit\t exit %s\n", pname);    
    printf("operators:\n");
    printf("\t+\t addition\n");
    printf("\t-\t subtraction\n");
    printf("\t*\t multiplication\n");
    printf("\t/\t division\n");
    printf("\t^\t exponent\n");
    printf("\t%\t modulus\n");
    printf("functions:\n");
    printf("\tabs(...)\t absolute value\n");
    printf("\tfloor(...)\t floor\n");
    printf("\tceil(...)\t ceiling\n");
    printf("\tsin(...)\t sine\n");
    printf("\tcos(...)\t cosine\n");
    printf("\ttan(...)\t tangent\n");
    printf("\tasin(...)\t arcsine\n");
    printf("\tacos(...)\t arccosine\n");
    printf("\tatan(...)\t arctangent\n");
    printf("\tsqrt(...)\t square root\n");
    printf("\tcbrt(...)\t cube root\n");
    printf("\tlog(...)\t logarithm\n");
    printf("\texp(...)\t exponentiation (e^x)\n");
    printf("\tmin(...)\t minimum\n");
    printf("\tmax(...)\t maximum\n");
    printf("\tsum(...)\t summation\n");
    printf("\tmean(...)\t mean\n");
    printf("\tavg(...)\t mean\n");
    printf("\tmedian(...)\t median\n");
    printf("\tvar(...)\t variance\n");
}

	if (prefs.precision < 0)

    while ((ch = getopt(argc, argv, "rm:p:h")) != -1) {

                break;
            case 'p':
                prefs.precision = atoi(optarg);
                break;
            case 'h':
                usage(argv[0]);

        if(strcmp(str, "help") == 0)
        {
            usage(argv[0]);
            goto get_new_string;
        }