diff options
Diffstat (limited to 'lcc/tst/stdarg.c')
| -rwxr-xr-x | lcc/tst/stdarg.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lcc/tst/stdarg.c b/lcc/tst/stdarg.c new file mode 100755 index 0000000..ff6c918 --- /dev/null +++ b/lcc/tst/stdarg.c @@ -0,0 +1,51 @@ +#include <stdarg.h>
+
+struct node { int a[4]; } x = {1,2,3,4};
+
+print(char *fmt, ...);
+
+main() {
+ print("test 1\n");
+ print("test %s\n", "2");
+ print("test %d%c", 3, '\n');
+ print("%s%s %w%c", "te", "st", 4, '\n');
+ print("%s%s %f%c", "te", "st", 5.0, '\n');
+ print("%b %b %b %b %b %b\n", x, x, x, x, x, x);
+ return 0;
+}
+
+print(char *fmt, ...) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ for (; *fmt; fmt++)
+ if (*fmt == '%')
+ switch (*++fmt) {
+ case 'b': {
+ struct node x = va_arg(ap, struct node);
+ printf("{%d %d %d %d}", x.a[0], x.a[1], x.a[2], x.a[3]);
+ break;
+ }
+ case 'c':
+ printf("%c", va_arg(ap, char));
+ break;
+ case 'd':
+ printf("%d", va_arg(ap, int));
+ break;
+ case 'w':
+ printf("%x", va_arg(ap, short));
+ break;
+ case 's':
+ printf("%s", va_arg(ap, char *));
+ break;
+ case 'f':
+ printf("%f", va_arg(ap, double));
+ break;
+ default:
+ printf("%c", *fmt);
+ break;
+ }
+ else
+ printf("%c", *fmt);
+ va_end(ap);
+}
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