c compiler doesn't work

fountain

大家好！我有个问题，好几天了都没有解决，请指点！
当我用c89和cc时会出现同样的问题，编一个很简单的程序：两个浮点数的加法 main()
{
float x,y;
printf("input x and y\n";
printf("enter x\n";
scanf("%f",&x);
printf("enter y\n";
scanf("%f",&y);
printf("x+y:%f\n",x+y);
}

1# c89 fadd.c -o fout
ld32: WARNING 110: Floating-point parameters exist in the call for "printf", a VARARG function, in object "fadd.o" without a prototype -- would result in invalid result. Definition can be found in object "/usr/lib32/mips4/libc.so"

3# ./fout
input x and y
enter x
3.6
enter y
4.6
x+y:0.000000
请问这是怎么回事啊？我还应该设置什么？

现在我想装一个软件，叫netcdf，可能是因为C编译器的问题，就进行不下去了。我在NETCDF目录中的操作如下：
11# cd netcdf-3.5.1-beta13
12# ls
src
13# cd src
14# ls
COMPATIBILITY README config.cache conftest.c libsrc ncdump
COPYRIGHT RELEASE_NOTES config.log conftestf.f macros.make ncgen
INSTALL.html VERSION config.status cxx macros.make.in nctest
MANIFEST aclocal.m4 configure f90 man nf_test
Makefile confdefs.h configure.in fortran nc_test rules.make

15# ./configure
loading cache ./config.cache
checking for top-level source-directory
/data/usr/people/wf/netcdf-3.5.1-beta13/src
checking for m4 preprocessor
checking for m4... (cached) m4
checking m4 flags... -B10000
checking C compiler "usr/bin/c89 -n32"... failed to compile test program
checking how to make dependencies... cc -M
checking for /usr/include/CC... /usr/include/CC -n32
checking C++ compiler "/usr/include/CC -n32"... configure: warning: /usr/include/CC -n32 failed

on standard C++ test program
checking for -n32... no
configure: warning: Could not find working C++ compiler
configure: warning: Setting CXX to the empty string
configure: warning: The C++ interface will not be built
checking how to run the C preprocessor... (cached) /lib/cpp
checking user-defined Fortran-77 compiler "/usr/bin/f77 -n32"... works
checking for Fortran .F compiler...
checking if Fortran-77 compiler handles *.F files... yes
checking user-defined Fortran-90 compiler "/usr/bin/f90 -n32"... works
checking for nm utility
checking for nm... (cached) nm
checking nm flags...
checking for C-equivalent to Fortran routine "SUB"... sub_
checking for Fortran "byte"... yes
checking for Fortran "integer*2"... yes
checking if Fortran "byte" is C "signed char"... configure: error: Could not compile conftest.c
找不到C编译器。
不知道为什么？
是我的环境变量设置不对吗？设置如下
setenv PATH  /usr/bin:/usr/lib:/usr/lib32/:/usr/local:/usr/include:/sbin:/usr/freeware/bin:/usr/freeware/lib:/usr/freewarePATH
setenv CC "usr/bin/c89 -n32"
setenv CPPFLAGS "-DNDEBUG"
setenv CFLAGS "-mips4"
setenv FC "/usr/bin/f77 -n32"
setenv FFLAGS "-mips4"
setenv F90 "/usr/bin/f90 -n32"
setenv F90FLAGS "-mips4"
setenv CXX "/usr/include/CC -n32"
setenv CXXFLAGS "-mips4"

不知道哪位能帮我一下，非常感谢！

思一克

是不是
#INCLUDE <FLOAT.H>;
等等缺少了。

bigluo

问题一：
我拿你的程序用gcc 3.2编译了一遍，这是结果，没有问题：
input x and y
enter x
2.3
enter y
4.5
x+y:6.800000
问题二：
好像是Fortran编译器的问题。

fountain

谢谢！你们两人说的都对，加个头文件就可以了，或者用gcc也可以编译。