#include <stdarg.h>
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#include <stdarg.h>
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struct node { int a[4]; } x = {1,2,3,4};
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struct node { int a[4]; } x = {1,2,3,4};
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print(char *fmt, ...);
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print(char *fmt, ...);
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main() {
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main() {
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print("test 1\n");
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print("test 1\n");
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print("test %s\n", "2");
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print("test %s\n", "2");
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print("test %d%c", 3, '\n');
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print("test %d%c", 3, '\n');
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print("%s%s %w%c", "te", "st", 4, '\n');
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print("%s%s %w%c", "te", "st", 4, '\n');
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print("%s%s %f%c", "te", "st", 5.0, '\n');
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print("%s%s %f%c", "te", "st", 5.0, '\n');
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print("%b %b %b %b %b %b\n", x, x, x, x, x, x);
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print("%b %b %b %b %b %b\n", x, x, x, x, x, x);
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return 0;
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return 0;
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}
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}
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print(char *fmt, ...) {
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print(char *fmt, ...) {
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va_list ap;
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va_list ap;
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va_start(ap, fmt);
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va_start(ap, fmt);
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for (; *fmt; fmt++)
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for (; *fmt; fmt++)
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if (*fmt == '%')
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if (*fmt == '%')
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switch (*++fmt) {
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switch (*++fmt) {
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case 'b': {
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case 'b': {
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struct node x = va_arg(ap, struct node);
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struct node x = va_arg(ap, struct node);
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printf("{%d %d %d %d}", x.a[0], x.a[1], x.a[2], x.a[3]);
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printf("{%d %d %d %d}", x.a[0], x.a[1], x.a[2], x.a[3]);
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break;
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break;
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}
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}
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case 'c':
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case 'c':
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printf("%c", va_arg(ap, char));
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printf("%c", va_arg(ap, char));
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break;
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break;
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case 'd':
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case 'd':
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printf("%d", va_arg(ap, int));
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printf("%d", va_arg(ap, int));
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break;
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break;
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case 'w':
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case 'w':
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printf("%x", va_arg(ap, short));
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printf("%x", va_arg(ap, short));
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break;
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break;
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case 's':
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case 's':
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printf("%s", va_arg(ap, char *));
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printf("%s", va_arg(ap, char *));
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break;
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break;
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case 'f':
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case 'f':
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printf("%f", va_arg(ap, double));
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printf("%f", va_arg(ap, double));
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break;
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break;
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default:
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default:
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printf("%c", *fmt);
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printf("%c", *fmt);
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break;
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break;
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}
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}
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else
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else
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printf("%c", *fmt);
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printf("%c", *fmt);
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va_end(ap);
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va_end(ap);
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}
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}
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