<string.h> functions stop working

[Ala]

had anyone have the experience of <string.h> functions stop working and prevent the whole programm to proceed?

[KnarfB]

No. Would be helpful if you provide more details...

[Ala]

thanks KnarfB

here is the example:

below you can see two functions, they both are same, but call() works and sms() doesn't:

void call(void){
 
ret=strstr(Rcv,"CALL");	//cheking "Call" phrase in Rcv array
if (ret) 
{
Rcv[(int)(ret-&Rcv[0])]='X';	//check mark to avoid looping
			  
 for(int n=0;n<13;n++)         //check which user to call
{
Call_Num[n]=Rcv[(int)(ret-&Rcv[0])+5+n];
}
for(int j=0;j<MaxUsers;j++)   //check which user is selected to be called
 {
if(strcmp(Call_Num,USERS_Num[j])==0)   //check which user is selected to be called
{     
//do stuff	
	}
  }
}
}

void sms(void){
ret=strstr(Rcv,"SMS");	//cheking "SMS" phrase in Rcv array
if (ret) 
{
Rcv[(int)(ret-&Rcv[0])]='X';	//check mark to avoid looping
for(int n=0;n<13;n++)         //check which user to send sms
{
SMS_Num[n]=Rcv[(int)(ret-&Rcv[0])+4+n];
}
for(int j=0;j<MaxUsers;j++)   //check which user is selected to send an SMS
{   
if(strcmp(SMS_Num,USERS_Num[j])==0)   //check which user is selected to send an SMS
{	     
//do stuff	
					}
			  }
}
}

in debugger mode I check and I see that USERS_Num[0] is just equal with Call_Num and SMS_Num. line 13th of sms() doesn't recognize this. also sometimes call() doesn't work eighter!

why is that?

[TDK]

I think you need to better define the problem you're having. "Doesn't work" is ambiguous. Nobody else knows what your program is trying to do except you, we can only assume. The bug is probably not in the <string.h> file.