56462316 发表于 2017-7-12 18:45:32

小白一只，这样打为什么会出错，求解

#include <stdio.h>
#include<stdio.h>


void main()
{
   doublex,s;
       printf("input number:\n");
       scanf("%lf",&x);
       s=sin(x);
       printf(sine of %lf is %lfln",x,s);



}
--------------------Configuration: Helloworid - Win32 Debug--------------------
Compiling...
Hello worid.c
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(10) : warning C4013: 'sin' undefined; assuming extern returning int
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2065: 'sine' : undeclared identifier
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int '
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : warning C4024: 'printf' : different types for formal and actual parameter 1
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2146: syntax error : missing ')' before identifier 'of'
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2001: newline in constant
执行 cl.exe 时出错.

Hello worid.obj - 1 error(s), 0 warning(s)

小甲鱼 发表于 2017-7-12 18:46:30

#include <stdio.h>
#include <math.h>

int main(void)
{
         double x, s;

         printf("input number:\n");
         scanf("%lf",&x);
         s = sin(x);
         printf(sine of %lf is %lf\n",x,s);
}

56462316 发表于 2017-7-12 19:08:00

小甲鱼 发表于 2017-7-12 18:46


#include <stdio.h>
#include <math.h>

int main(void)
{
         double x, s;

         printf("input number:\n");
         scanf("%lf",&x);
         s = sin(x);
         printf(sine of %lf is %lf\n",x,s);
}

--------------------Configuration: Helloworid - Win32 Debug--------------------
Compiling...
Hello worid.c
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2065: 'sine' : undeclared identifier
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int '
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : warning C4024: 'printf' : different types for formal and actual parameter 1
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2146: syntax error : missing ')' before identifier 'of'
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2017: illegal escape sequence
E:\Microsoft Visual Studio\MyProjects\Helloworid\Hello worid.c(11) : error C2001: newline in constant
执行 cl.exe 时出错.

Hello worid.obj - 1 error(s), 0 warning(s)
额还是不对，难道我下的软件有问题{:10_266:}

小甲鱼 发表于 2017-7-12 19:10:52

56462316 发表于 2017-7-12 19:08
#include
#include



少了个双引号：

#include <stdio.h>
#include <math.h>

int main(void)
{
         double x, s;

         printf("input number:\n");
         scanf("%lf",&x);
         s = sin(x);
         printf("sine of %lf is %lf\n",x,s);
}

56462316 发表于 2017-7-12 19:17:16

小甲鱼 发表于 2017-7-12 19:10
少了个双引号：

感谢

y847551921 发表于 2017-7-13 15:24:55

一定要用#include <math.h>的预处理命令！！！！
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