include #include \x0d\x0avoid main()\x0d\x0a{\x0d\x0a double i = 2, j =4;\x0d\x0a printf("log2,4 = %f\n",log(j)/log(i));\x0d\x0a}\x0d\x0a\x0d\x0a//log函数是以e为底的，还有一个log10以10为底，可以利用logi，j＝loge，j/loge，i来算。
log #包含源码文件的makefile OBJS+=$(LOG_OBJ) #添加目标文件 编译测试 编译 执行make: 代码语言:javascript 复制 g++ -I./easylogger/easylogger/inc -I./easylogger/source_code/inc -I./easylogger/source_code/plugins/file -O0 -g3 -Wall -Wall -I. -c main.cpp -o out/main.o main.cpp: ...
用 法: double log10(double x);程序示例:include <math.h> include <stdio.h>int main(void){ double result;double x = 800.6872;result = log10(x);printf("The common log of %lf is %lf\n", x, result);return 0;} 3、函数名: log 功 能: 对数函数log,以e(2.71828)为...
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i=((j+k)>(m-n)?(j+k):(m-n));if(((i)%2==0))i++; 如这个例子所显示的,带参数的宏经常用来作为一些简单的函数使用。MAX类似一个从两个值中选取较大的值的函数。IS_EVEN则类似于另一种函数,该函数当参数为偶数时返回1,否则返回0。
错误原因是你在scanf()中用了%f来转换double型，应该用%lf才对。下面改后的运行正确。include <stdio.h> include<math.h> void main(){ double i,x;scanf("%lf",&i);x=log10(i);printf("%f\n",x);getchar();}
On Arch Linux, I recommend installing the following packages via pacman:shaderc vulkan-devel ninja cmake. Building an Island project Important If you freshly cloned the Island repository, remember to update submodules before proceeding. git submodule init git submodule update --depth=1 ...
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函数级的实现:应当作为log库存在,每个需要log的模块都链接它而非源码包含它;但对于不怎么让用依赖库的场景下,把log的实现包含在各个模块中,每个模块能快速开发;隐患是各个模块编译后可能产生同名符号,集成多个模块时触发链接问题,并且由于不同编译器对应的链接器的链接策略不同,导致PC和设备结果不一致。