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