我有以下的C++代码:
#include <math.h>
#include <cmath.h> // per http://www.cplusplus.com/reference/clibrary/cmath/abs/
// snip ...
if ( (loan_balance < 0) && (abs(loan_balance) > loan_payment) ) {
...
}
并且 make
在以下情况下崩溃:
error: call of overloaded 'abs(double)' is ambiguous
还有其他感兴趣的内容:
/usr/include/stdlib.h:785: note: candidates are: int abs(int)
我该如何指定编译器调用 cmath.h 中可以处理浮点数的 abs() 函数?
编译器信息(不确定是否相关):
[some_man@some_box ~/some_code]# gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr /share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-libgcj-multifile --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --with-cpu=generic --host=i386-redhat-linux
Thread model: posix
gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)