函数名: spawnl 
 功  能: 创建并运行子程序 
 用  法: #include <process.h> 
         int spawnl(int mode, char *pathname, char *arg0, arg1, ... argn, NULL); 
 程序例: 
#include <process.h> 
 #include <stdio.h> 
 #include <conio.h> 
int main(void) 
 { 
    int result; 
   clrscr(); 
    result = spawnl(P_WAIT, "tcc.exe", NULL); 
    if (result == -1) 
    { 
       perror("Error from spawnl"); 
       exit(1); 
    } 
    return 0; 
 }