#include<stdio.h>

typedef struct

{

double **p

int rows

int cols

}MATRIX

MATRIX matrix_inverse(MATRIX matrix)

void sweep(MATRIX matrix)

MATRIX create(int rows,int cols)

MATRIX multiply(MATRIX matrix1,MATRIX matrix2)

MATRIX buildmatrix(MATRIX matrix)

MATRIX input(MATRIX matrix)

void printmatrix(MATRIX matrix)

int main()

{

int n

MATRIX A,b

printf("Please input the dimension of the liner equations\n")

scanf("%d",&n)

printf("Please input the quotiety of the eqaution\n")/*输入方程的系数矩阵.*/

A=create(n,n)

input(A)

b=create(n,1)

printf("请输入方程右边的数字\n")

input(b)

printf("The resullt is:\n")

printmatrix(multiply(matrix_inverse(A),b))

system("pause")

return 0

}

MATRIX matrix_inverse(MATRIX matrix)

{

int i,j,k,m

MATRIX temp,result

double *p,rate

if(matrix.rows!=matrix.cols||matrix.p==NULL)

{

printf("Error: This matrix has no inverse,because it's rows doesn't equal columns" )

printf(" or the matrix dosen't exist\n")

temp=create(0,0)

return temp

}

temp=buildmatrix(matrix)

for(i=0i<temp.rows-1++i)

{

if(temp.p[i][i]<=1e-14)

{

for(m=i+1m<temp.rows++m)

{

if(temp.p[m][i]>1e-14)

{

p=temp.p[i]

temp.p[i]=temp.p[m]

temp.p[m]=p

break

}

else

continue

}

if(m==temp.rows)

{

printf("Error: This matrix has no inverse,because it's determinant equals zero\n" )

sweep(temp)

temp=create(0,0)

return temp

}

else

}

else

for(j=i+1j<temp.rows++j)

{

rate=temp.p[j][i]/temp.p[i][i]

for(k=i+1k<temp.cols++k)

temp.p[j][k]-=rate*temp.p[i][k]

}

}

if(temp.p[temp.rows-1][temp.rows-1]<=1e-14)

{

printf("Error: This matrix has no inverse,because it's determinant equals zero\n" )

temp=create(0,0)

return temp

}

for(i=temp.rows-1i>0--i)

for(j=0j<i++j)

{

rate=temp.p[j][i]/temp.p[i][i]

for(k=temp.rowsk<temp.cols++k)

temp.p[j][k]-=rate*temp.p[i][k]

}

for(i=0i<temp.rows++i)

for(j=temp.rowsj<temp.cols++j)

temp.p[i][j]*=1.0/temp.p[i][i]

result=create(matrix.rows,matrix.cols)

for(i=0i<temp.rows++i)

for(j=matrix.colsj<temp.cols++j)

result.p[i][j-matrix.cols]=temp.p[i][j]

sweep(temp)

return result

}

void sweep(MATRIX matrix)

{

int i

for(i=0i<matrix.rows++i)

free(matrix.p[i])

free(matrix.p)

}

MATRIX create(int rows,int cols)

{

int i

MATRIX result

if(rows>0&&cols>0)

{

result.p=(double**)malloc(rows*sizeof(double*))

result.rows=rows

result.cols=cols

for(i=0i<rowsi++)

result.p[i]=(double*)malloc(cols*sizeof(double))

}

else

{

result.p=NULL

result.rows=0

result.cols=0

}

return result

}

MATRIX multiply(MATRIX matrix1,MATRIX matrix2)

{

int x,y,k

MATRIX matrix

if(matrix1.p==NULL||matrix2.p==NULL)

{

printf("Error:One or two matrixes not exist\n")

matrix=create(0,0)

return matrix

}

else if(matrix1.cols==matrix2.rows)

{

matrix=create(matrix1.rows,matrix2.cols)

for(x=0x<matrix1.rows++x)

for(y=0y<matrix2.cols++y)

*(*(matrix.p+x)+y)=0.00

for(x=0x<matrix1.rows++x)

for(y=0y<matrix2.cols++y)

for(k=0k<matrix1.cols++k)

matrix.p[x][y]+=matrix1.p[x][k]*matrix2.p[k][y]

return matrix

}

else if(matrix2.cols==1&&matrix2.rows==1)

{

matrix=create(matrix1.rows,matrix1.cols)

for(x=0x<matrix1.rows++x)

for(y=0y<matrix1.cols++y)

matrix.p[x][y]=matrix1.p[x][y]*matrix2.p[0][0]

return matrix

}

else if(matrix1.cols==1&&matrix1.rows==1)

{

matrix=create(matrix2.rows,matrix2.cols)

for(x=0x<matrix2.rows++x)

for(y=0y<matrix2.cols++y)

matrix.p[x][y]=matrix2.p[x][y]*matrix1.p[0][0]

return matrix

}

else

{

printf("The two matrixes can't be multipled\n")

matrix=create(0,0)

return matrix

}

}

MATRIX buildmatrix(MATRIX matrix)

{

MATRIX temp

int i,j

temp=create(matrix.rows,2*matrix.cols)

for(i=0i<temp.rows++i)

for(j=0j<matrix.cols++j)

temp.p[i][j]=matrix.p[i][j]

for(i=0i<temp.rows++i)

for(j=matrix.colsj<temp.cols++j)

{

if(j-i==matrix.cols)

temp.p[i][j]=1.0

else

temp.p[i][j]=0.0

}

return temp

}

MATRIX input(MATRIX matrix)

{

int i,j

for(i=0i<matrix.rows++i)

for(j=0j<matrix.cols++j)

scanf("%lf",(*(matrix.p+i)+j))

return matrix

}

void printmatrix(MATRIX matrix)

{

int i,j

if(matrix.p!=NULL)

for (i=0i<matrix.rows++i)

{

for (j=0j<matrix.cols++j)

printf("%-g\t",matrix.p[i][j])

printf("\n")

}

else

{

printf("Error:The matrix dosen't exist!\n")

return

}

}

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freemarker文件还是html代码占多数，即使是freemarker代码，也会经过服务器翻译成html代码返回到浏览器端，所以说，你可以在freemarker文件里，直接用html的语法引入CSS和JS。

说白了，freemarker只是辅助你写html文件而已，你当做写html文件就行了，不用想那么复杂。

如下代码，只有标记到的地方是freemarker语法，其余都是html语法

<!DOCTYPE html>

<html lang="zh-CN">

<head>

<meta charset="utf-8">

<!-- 这句是freemaker -->

<title>${webSite.title!}</title>

<!-- 这句的base是freemaker，其余不是 -->

<script src="${base}/resource/plugin/require/require.js"></script>

</head>

<body>

<!-- 这句的user.name是freemaker，其余不是 -->

<h1>欢迎您，${user.name}</h1>

<!-- 这句是freemaker -->

<#include "body.html">

</body>

</html>

---