?? xopen-3.c
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/* Test for warnings for $ operand numbers after ordinary formats. Bug c/15444 from james-gcc-bugzilla-501qll3d at and dot org. *//* Origin: Joseph Myers <jsm@polyomino.org.uk> *//* { dg-do compile } *//* { dg-options "-std=gnu99 -Wformat" } */#include "format.h"voidfoo (int i){ printf ("%d%2$d", i); /* { dg-warning "used after format" "mixing $ and non-$ formats" } */ printf ("%d%*1$d", i, i); /* { dg-warning "used after format" "mixing $ and non-$ formats" } */ printf ("%d%.*1$d", i, i); /* { dg-warning "used after format" "mixing $ and non-$ formats" } */}?? 快捷鍵說明
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