用于进行gcc测试

				/* Test for diagnostics for Wconversion between floating-point and				   integers. C++ equivalent of				   gcc/testsuite/gcc.dg/Wconversion-real-integer.c */								/* { dg-do compile }				/* { dg-options "-Wconversion" } */								#include 								void fsi (signed int x);				void fui (unsigned int x);				void ffloat (float x);				void fdouble (double x);								float  vfloat;				double vdouble;								void h (void)				{				  unsigned int ui = 3;				  int   si = 3;				  unsigned char uc = 3;				  signed char sc = 3;				  float  f = 3;				  double d = 3;								  fsi (3.1f); /* { dg-warning "conversion" } */				  si = 3.1f; /* { dg-warning "conversion" } */				  fsi (3.1);  /* { dg-warning "conversion" } */				  si = 3.1;  /* { dg-warning "conversion" } */				  fsi (d);    /* { dg-warning "conversion" } */				  si = d;    /* { dg-warning "conversion" } */				  fui (-1.0); /* { dg-warning "overflow" } */				  ui = -1.0;   /* { dg-warning "overflow" } */				  ffloat (INT_MAX);  /* { dg-warning "conversion" } */				  vfloat = INT_MAX;  /* { dg-warning "conversion" } */				  ffloat (16777217); /* { dg-warning "conversion" } */				  vfloat = 16777217; /* { dg-warning "conversion" } */				  ffloat (si); /* { dg-warning "conversion" } */				  vfloat = si; /* { dg-warning "conversion" } */				  ffloat (ui); /* { dg-warning "conversion" } */				  vfloat = ui; /* { dg-warning "conversion" } */								  fsi (3);				  si = 3;				  fsi (3.0f);				  si = 3.0f;				  fsi (3.0);				  si = 3.0;				  fsi (16777217.0f);				  si = 16777217.0f;				  fsi ((int) 3.1);				  si = (int) 3.1;				  ffloat (3U);				  vfloat = 3U;				  ffloat (3);				  vfloat = 3;				  ffloat (INT_MIN);				  vfloat = INT_MIN;				  ffloat (uc);				  vfloat = uc;				  ffloat (sc);				  vfloat = sc;								  fdouble (UINT_MAX);				  vdouble = UINT_MAX;				  fdouble (ui);				  vdouble = ui;				  fdouble (si);				  vdouble = si;				}