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]#include<stdio.h> 
#include<stdlib.h> 
#include<string.h> 
#include<conio.h> 

char * substr(char a[] ,int s,int l) 
{ 
int i; 
char * b; 
b=NULL; 
for(i=s;i<=s+l-1;i++) 
{ 
b[i-s]=a[i-1]; 
} 
b[i-1]='\0'; 
//printf("%s",b); 

return b; 
} 

int Calc_call_code(int CALL_TYPE_CODE,int CALL_SERVICE_TYPE_CODE, char CALL_TERMINATING_NBR[],char TER_OPR_CD[],char CALL_TYPE[],char ORG_TER_OPR_NAME[], char CALL_ROAM_NET_OPERATOR_CODE[]) 
{ 
int CALL_CODE; 

switch(CALL_TYPE_CODE) 
{ 
case 1: { CALL_CODE=55;break;} 
case 2: { CALL_CODE=56;break;} 
case 3: { 
switch(CALL_SERVICE_TYPE_CODE) 
{ 
case -722: {CALL_CODE=72;break;} 
case -679: {CALL_CODE=86;break;} 
case -99 : {CALL_CODE=52;break;} 
};break; 
} 
case 4:{switch(CALL_SERVICE_TYPE_CODE) 
{ 
case -732: 
case -728: 

case -726: 
case -724: {CALL_CODE=54;break;} 
case -730:{CALL_CODE=53;break;} 
}; break; 
} 
case 5: { {CALL_CODE=51;} 
break; 
} 
case 6: {if(CALL_TERMINATING_NBR != "-99" && strcmp(substr(CALL_TERMINATING_NBR,1,5),"56465") == 0) { 

CALL_CODE=35;} 
else CALL_CODE=39; 
break;} 

default: CALL_CODE=1000; 
} 
return CALL_CODE; 
}