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@(@\newcommand{\W}[1]{ \; #1 \; } \newcommand{\R}[1]{ {\rm #1} } \newcommand{\B}[1]{ {\bf #1} } \newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} } \newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} } \newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} } \newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }@)@
Main Program For Comparing C and C++ Speed

Source Code 
int main(void)
{     bool flag;
     size_t i;

     random_seed(123);

     printf("correct_det_by_minor: ");
     flag = correct_det_by_minor();
     if( flag )
          printf("OK\n");
     else     printf("Error\n");

     for(i = 0; i < 5; i++)
     {     double time_min = 1.0;
          size_t size     = 2 + i * 2;
          int   i_size    = (int) size;
          printf("time_det_minor for %d x %d matrix = ", i_size, i_size);
          printf("%g\n", time_det_by_minor(size, time_min) );
     }

     if( flag )
          return 0;
     return 1;
}
Input File: test_more/compare_c/det_by_minor.c