Re: Call a C program from RPG with variables & a return

Greetings,
I am looking for some example 'C' code that will allow me to pass 12
numeric variables from an SQLRPGLE program to a 'C' program that will
calculate the geometric mean for them and return the value to the SQLRPGLE
program.
I found an example where an RPG program will pass two character fields to
a 'C' program which will concatenate and return them, however I know
nothing of 'C', its syntax, or setting it up with an 'int' or 'void' to get
my example to do what I want.
Currently, this is the 'C' code example I am working with:
#include <stdio.h>

/* Main program. */


int main(int argc, char *argv[])
{

/* Display
parameters sent to the program. */
printf("Incoming parameter 1 = %s\n", argv[1]);
printf("Incoming parameter 2 = %s\n", argv[2]);

/*
Concatenate the two incoming parameters into the third parameter. */
strcpy(argv[3],argv[1]);
strcat(argv[3],argv[2]);

/*
End of program. Returning with concatenation of parameters 1 and 2 into
parameter 3. */ return;

}

I have found a 'C' program example that calculates the geometric mean I am
looking for, but it is set up as follows:
#include<stdio.h> #include<math.h>
int main(void)
{ //
((X1)(X2)(X3)........(XN))1/N double
x1=2,x2=4,x3=6,x4=7,x5=6; double x,N=5;
x=(x1*x2*x3*x4*x5);
x=pow(x,(1/N)); printf("Geometric Mean for
Xn: %lf",x); return 0; }

I believe I would need to set up x1=argv[1], x2=argv[2] and so on, but I
do not believe I am setting up the variables correctly to pass back what I
am looking for.
Any suggestions would be greatly appreciated. Thanks. Regards, Stephen
Mooney
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