text: #ifdef __cplusplus
  extern "C" { 
  #endif  
  
  #include "f2c.h" 
  
  int ctgexc_(logical *wantq, logical *wantz, integer *n, complex *a, integer *lda, complex *b, integer *ldb, complex *q, integer *ldq, complex *z__, integer *ldz, integer *ifst, integer *ilst, integer *info);
  
  #ifdef __cplusplus
  }
  #endif