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/* EXPECT:
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36
<1.5>
1.1 + 2.1 + 3.1 + 5.1 + 1.5 + -1.5 + 1.5 + -1.5 + 1.5 + -1 = 11.9
fwd()/1: Hello World
fwd()/2: Hello World
*/
#include <stdarg.h>
#include <stdio.h>
int sum(int x, ...) {
va_list ap;
va_start(ap, x);
printf("%d", x);
for (int y; (y = va_arg(ap, int));) {
printf(" + %d",y);
x += y;
}
va_end(ap);
return x;
}
double stkarg(double a, double b, double c, double d, double e, double f, double g, double h, double x) {
printf("");
return x;
}
double sumf(double x, ...) {
va_list ap;
va_start(ap, x);
printf("%g", x);
for (double y; (y = va_arg(ap, double));) {
printf(" + %g",y);
x += y;
}
va_end(ap);
return x;
}
void fwd(const char *fmt, ...) {
va_list ap, aq;
va_start(ap, fmt);
va_copy(aq, ap);
printf("fwd()/1: ");
vprintf(fmt, ap);
va_end(ap);
printf("\n");
printf("fwd()/2: ");
vprintf(fmt, aq);
printf("\n");
va_end(aq);
}
int main() {
printf(" = %d\n", sum(1,2,3,4,5,6,7,8,0,0));
printf("<%g>\n", stkarg(0,0,0,0,0,0,0,0,1.5));
printf(" = %g\n", sumf(1.1, 2.1, 3.1, 5.1, 1.5, -1.5, 1.5, -1.5, 1.5, -1.0, 0.0));
fwd("%s %s", "Hello", "World");
}
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