loadrunner中大小写字符转换函数封装：

//封装ConvertToXXX函数：  int ConvertToUpper(char * sInput, char * sNew)  {   sInput = (char *)strupr(sInput);   lr_save_string(sInput,sNew);  }     int ConvertToLower(char * sInput, char * sNew)  {   sInput = (char *)strlwr(sInput);   lr_save_string(sInput,sNew);  }  int ConvertToTitle(char * sInput, char * sNew)  {   int i = 0, s = 0, l = 0;   char buf1[50];   char buf2[2];   char n;    strncpy(&n,sInput+i,1);   sprintf(buf2,"%c",n);   strupr(buf2);   strcpy(buf1,buf2);   i++;   while(i < strlen(sInput))   {    strncpy(&n,sInput+i,1);    sprintf(buf2,"%c",n);      if(s == 1){     strupr(buf2);     strcat(buf1,buf2);     s = 0;    }     else{     strlwr(buf2);     strcat(buf1,buf2);    }      if(strcmp(" ",buf2)==0)    {     s = 1;    }    i++;   }   lr_save_string(buf1,sNew);  }

login() {    lr_save_string("testing is believing","str");         ConvertToUpper(lr_eval_string("{str}"),"UpperStr");         lr_output_message(lr_eval_string("{UpperStr}"));        ConvertToLower(lr_eval_string("{str}"),"LowerStr");         lr_output_message(lr_eval_string("{LowerStr}"));            ConvertToTitle(lr_eval_string("{str}"),"TitleStr");         lr_output_message(lr_eval_string("{TitleStr}"));