t.();

}

int _tmain(int argc, _TCHAR* argv[])

{

char inFix[100];

char postFix[100];

double val;

while (1)

{

printf("enter an expression:");

gets_s(inFix);

if (strlen(inFix) == 0)

買粉絲ntinue;

printf("\n%s = ", inFix);

inFix2PostFix(inFix, postFix);

printf("%s = ", postFix);

val = postFixEval(postFix);

printf("%.3f\n", val);

}

return 0;

}