調用CLAPACK函數後初始化變量

Question

我最近設法構建並運行了一個簡單的CLAPACK Microsoft Visual Studio 2008項目（從http://icl.cs.utk.edu/lapack-for-windows/lapack/index.html下載）。之後，在LAPACK dgesv_ call之後插入一行以初始化另一個整數tempInteger會導致不成功的構建。錯誤是：CLAPACK-EXAMPLE.c（30）：錯誤C2143：語法錯誤：缺少';'在「類型」之前。看起來LAPACK函數的執行阻止了某些動作，例如之後的變量初始化。任何人都可以幫助我瞭解發生了什麼並解決它？提前致謝。代碼清單如下：

#include < stdio.h> 
#include "f2c.h" 
#include "clapack.h" 

int main(void) 
{ 
    /* 3x3 matrix A 
    * 76 25 11 
    * 27 89 51 
    * 18 60 32 
    */ 
    double A[9] = {76, 27, 18, 25, 89, 60, 11, 51, 32}; 
    double b[3] = {10, 7, 43}; 

    int N = 3; 
    int nrhs = 1; 
    int lda = 3; 
    int ipiv[3]; 
    int ldb = 3; 
    int info; 
    int qqq = 1; 

    dgesv_(&N, &nrhs, A, &lda, ipiv, b, &ldb, &info); 

    if(info == 0) /* succeed */ 
    printf("The solution is %lf %lf %lf\n", b[0], b[1], b[2]); 
    else 
    fprintf(stderr, "dgesv_ fails %d\n", info); 

    int tempInteger = 1; 

    return info; 
} 

Answer 1

如果該文件編譯爲C文件，而不是C++文件，然後聲明tempInteger類型應在功能上的日最高完成。 例如：

#include < stdio.h> 
#include "f2c.h" 
#include "clapack.h" 

int main(void) 
{ 
    /* 3x3 matrix A 
    * 76 25 11 
    * 27 89 51 
    * 18 60 32 
    */ 
    double A[9] = {76, 27, 18, 25, 89, 60, 11, 51, 32}; 
    double b[3] = {10, 7, 43}; 

    int N = 3; 
    int nrhs = 1; 
    int lda = 3; 
    int ipiv[3]; 
    int ldb = 3; 
    int info; 
    int qqq = 1; 
    int tempInteger; 

    dgesv_(&N, &nrhs, A, &lda, ipiv, b, &ldb, &info); 

    if(info == 0) /* succeed */ 
    printf("The solution is %lf %lf %lf\n", b[0], b[1], b[2]); 
    else 
    fprintf(stderr, "dgesv_ fails %d\n", info); 

    tempInteger = 1; 

    return info; 
}