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/* varargs.c -
* (Added as part of fix for bug 15306 - "call" to varargs functions fails)
* This program is intended to let me try out "call" to varargs functions
* with varying numbers of declared args and various argument types.
* - RT 9/27/95
*/
#include <stdio.h>
#include <stdarg.h>
int find_max1(int, ...);
int find_max2(int, int, ...);
double find_max_double(int, double, ...);
char ch;
unsigned char uc;
short s;
unsigned short us;
int a,b,c,d;
int max_val;
float fa,fb,fc,fd;
double da,db,dc,dd;
double dmax_val;
main() {
c = -1;
uc = 1;
s = -2;
us = 2;
a = 1;
b = 60;
max_val = find_max1(1, 60);
max_val = find_max1(a, b);
a = 3;
b = 1;
c = 4;
d = 2;
max_val = find_max1(3, 1, 4, 2);
max_val = find_max2(a, b, c, d);
da = 3.0;
db = 1.0;
dc = 4.0;
dd = 2.0;
dmax_val = find_max_double(3, 1.0, 4.0, 2.0);
dmax_val = find_max_double(a, db, dc, dd);
}
/* Integer varargs, 1 declared arg */
int find_max1(int num_vals, ...) {
int max_val = 0;
int x;
int i;
va_list argp;
va_start(argp, num_vals);
printf("find_max(%d,", num_vals);
for (i = 0; i < num_vals; i++) {
x = va_arg(argp, int);
if (max_val < x) max_val = x;
if (i < num_vals - 1)
printf(" %d,", x);
else
printf(" %d)", x);
}
printf(" returns %d\n", max_val);
return max_val;
}
/* Integer varargs, 2 declared args */
int find_max2(int num_vals, int first_val, ...) {
int max_val = 0;
int x;
int i;
va_list argp;
va_start(argp, first_val);
x = first_val;
if (max_val < x) max_val = x;
printf("find_max(%d, %d", num_vals, first_val);
for (i = 1; i < num_vals; i++) {
x = va_arg(argp, int);
if (max_val < x) max_val = x;
printf(", %d", x);
}
printf(") returns %d\n", max_val);
return max_val;
}
/* Double-float varargs, 2 declared args */
double find_max_double(int num_vals, double first_val, ...) {
double max_val = 0;
double x;
int i;
va_list argp;
va_start(argp, first_val);
x = first_val;
if (max_val < x) max_val = x;
printf("find_max(%f, %f", num_vals, first_val);
for (i = 1; i < num_vals; i++) {
x = va_arg(argp, double);
if (max_val < x) max_val = x;
printf(", %f", x);
}
printf(") returns %f\n", max_val);
return max_val;
}
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