程序运行时间（Linux）

C实现

#include <math.h>  
#include <stdio.h>  
#include <sys/time.h>  
  int main(int argc, int **argv)  
{
    
    int i;
    
    struct timeval start;
    
    struct timeval end;
    
    double timeuse;
    
    char *exec_argv[4];
    
    if (argc == 1)  
    
  {
      
        printf("Error!\n");
      
        exit(0);
      
    
  }
    
    if (fork() == 0)  
    
  {
      
        for (i = 0; i < argc; i++)  
        
    {
        
            exec_argv[i] = argv[i + 1];
        
            printf("[%d]:%s\n", i, exec_argv[i]);
        
        
    }
      
 
        printf("Child Create\n");
      
        execv(argv[1], exec_argv);
      
    
  }
    
    else     
  {
      
        gettimeofday( & start, NULL);
      
        wait(1000);
      
        gettimeofday( & end, NULL);
      
        timeuse = (1000000 * (end.tv_sec - start.tv_sec) + end.tv_usec - start.tv_usec);
      
        printf("time:%lf ms\n", timeuse);
      
    
  }
    
    return 0;
    
}