#include <stdio.h>                                                              
#include <stdlib.h>                                                             
#include <string.h>                                                             
                                                                                
#define TRUE         0                                                          
#define FALSE       -1                                                          
void strins(char *buf, int pos, const char *str);                               
                                                                                
void main(void){                                                                
  char str[128];                                                                
                                                                                
   printf("** TESTINS :  •¶Žš—ñ‚Ì‘}“ü **\n");                                   
   getchar();                                                                   
                                                                                
  strcpy(str, "facabcxbadd");                                                   
  printf("[%d] str = [%s]\n", __LINE__, str);                                   
  getchar();                                                                    
  printf("abc--> <123> \n");                                                    
  strins(str, 3, " <123> ");                                                    
  printf("[%d] str = [%s]\n", __LINE__, str);                                   
  getchar();                                                                    
                                                                                
}                                                                               
/*********************************************************/                     
void strins(char *buf, int pos, const char *str)                                
/*********************************************************/                     
{                                                                               
  char* tmp;                                                                    
  long  tmplen;                                                                 
                                                                                
    tmplen = strlen(&buf[pos]);                                                 
    tmp = (char*)malloc(tmplen+1);                                              
    strcpy(tmp, &buf[pos]);                                                     
    strcpy(&buf[pos], str);                                                     
    strcat(buf, tmp);                                                           
    free(tmp);                                                                  
}