Ch Code for Applet-Based Web Calculator
<![CDATA[
#!/bin/ch
/* Copyright (c) 2001 by SoftIntegration, Inc. All Rights Reserved */
/* Web Calculator source code written in Ch */
#include <cgi.h>
void sendApplet(char *x, char *y, char *expr) {
class CResponse Response;
Response.setContentType("application/x-sch");
Response.begin();
fprintf stdout << ENDFILE
#include<stdio.h>
int main() {
double x = $x;
double y = $y;
printf("x = %f", x);
printf("y = %f\n", y);
printf("$expr = %f\n", $expr);
getchar(); // Hold result for display in windows
}
ENDFILE
Response.end();
}
void errorHandler(char *reason) {
class CResponse Response;
Response.begin();
Response.title("Web Calculator");
fprintf stdout << ENDFILE
<H3>Web Calculator Failed</H3>
Your mathematical expression has not been submitted to Web Calculator
because $reason.
<A HREF="/docs/ch/applet/calculator.html">Try again.</A>
<P><HR SIZE=4>
<A HREF="http://www.softintegration.com">SoftIntegration, Inc.</A>
ENDFILE
Response.end();
exit(0);
}
int main() {
class CRequest Request;
int num;
chstrarray name, value;
num = Request.getFormNameValue(name, value);
if(num==0)
errorHandler("you submitted nothing");
if(!value[0])
errorHandler("you didn't input x value");
else if(!isnum(value[0]))
errorHandler("x is not a valid number");
else if(!isnum(value[1]))
errorHandler("y is not a valid number");
if(!value[2])
errorHandler ("you didn't input mathematical expression");
sendApplet(value[0], value[1], value[2]);
}
]]>
|
|