You may want to make your tables -- and dummy input --have int type. A character 0 ('\0') is not the same as '0'.

Either that, or use '0' and '1' in the char table.

This isn't helping me either . The function ain't compiling??

I can't see what you're doing. Here's what I had done.

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#include<iostream>
using namespace std;
int N, Q, M;//number of user inputs, states, and outputs of the machine
char char_table[4][3] = { {'0','0','0'},
                          {'0','1','0'},
                          {'1','0','0'},
                          {'1','1','0'} };

char ex_table[4][4] = {   {'0','0','0','0'},
                          {'0','1','0','0'},
                          {'1','0','0','0'},
                          {'1','1','0','0'} };

void char_func();
void ex_func();
int  power(int n);
//------------------------------------------------------
int main(){
int itr;
    cout<<" Enter  1)The number of inputs\n\t2)Number of states ,and";
    cout<<"\n\t3)Number of outputs \n of the sequential state machine \n";
    cin>> N ;  cin>> Q ;  cin>> M ;
    cout<<N ;  cout<<Q ;  cout<<M ;
    char_func();
    ex_func();
return 1;
}
//int CHARSSM[power(Q)-1][2*(N+M)-1];

void char_func(){
int itr,itr1,itr2;
char dummy;
int count=0;
    cout<<"\n please write out the chrecteristic table of your flip-flop on a piece of paper";
    cout<<"\n Iam assuming FF with 2 inputs and 2 states \n"; //I don't know if can be of different types too.
    cout<<"\n The first two columns have been filled by the program ";
    cout<<"in the order corresponding to q=0,q=1,q=2 and q=3 \n";
    cout<<" Enter the third column of the CHARECTERISTIC table \n";
    cout<<" Enter M for the memory state and T for toggle state\n";
    cout<<" The order in which you enter the values is important\n";

    for(itr = 0; itr < 4; itr++ ){cin>> dummy; char_table[itr][2] = dummy;}

    for(itr1 = 0; itr1 < 4; itr1++ ){cout<<"\n";
       for(itr = 0; itr < 3 ; itr++ ){count++;
           cout<<" "<< char_table[itr1][itr];
       }
    }
    cout<<"count = " << count;
    cout<<"\n\n";
    cout<< char_table[0][0] << char_table[1][0]<< char_table[2][0]<< char_table[3][0];
    cout<< char_table[0][1] << char_table[1][1]<< char_table[2][1]<< char_table[3][1];
}
//----------------------------------------------------------------------------------
void ex_func(){


}

#include<iostream> using namespace std; int N, Q, M;//number of user inputs, states, and outputs of the machine char char_table[4][3] = { {'0','0','0'}, {'0','1','0'}, {'1','0','0'}, {'1','1','0'} }; char ex_table[4][4] = { {'0','0','0','0'}, {'0','1','0','0'}, {'1','0','0','0'}, {'1','1','0','0'} }; void char_func(); void ex_func(); int power(int n); //------------------------------------------------------ int main(){ int itr; cout<<" Enter 1)The number of inputs\n\t2)Number of states ,and"; cout<<"\n\t3)Number of outputs \n of the sequential state machine \n"; cin>> N ; cin>> Q ; cin>> M ; cout<<N ; cout<<Q ; cout<<M ; char_func(); ex_func(); return 1; } //int CHARSSM[power(Q)-1][2*(N+M)-1]; void char_func(){ int itr,itr1,itr2; char dummy; int count=0; cout<<"\n please write out the chrecteristic table of your flip-flop on a piece of paper"; cout<<"\n Iam assuming FF with 2 inputs and 2 states \n"; //I don't know if can be of different types too. cout<<"\n The first two columns have been filled by the program "; cout<<"in the order corresponding to q=0,q=1,q=2 and q=3 \n"; cout<<" Enter the third column of the CHARECTERISTIC table \n"; cout<<" Enter M for the memory state and T for toggle state\n"; cout<<" The order in which you enter the values is important\n"; for(itr = 0; itr < 4; itr++ ){cin>> dummy; char_table[itr][2] = dummy;} for(itr1 = 0; itr1 < 4; itr1++ ){cout<<"\n"; for(itr = 0; itr < 3 ; itr++ ){count++; cout<<" "<< char_table[itr1][itr]; } } cout<<"count = " << count; cout<<"\n\n"; cout<< char_table[0][0] << char_table[1][0]<< char_table[2][0]<< char_table[3][0]; cout<< char_table[0][1] << char_table[1][1]<< char_table[2][1]<< char_table[3][1]; } //---------------------------------------------------------------------------------- void ex_func(){ }

A sample run is then as follows.

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/* my output
 Enter  1)The number of inputs
	2)Number of states ,and
	3)Number of outputs 
 of the sequential state machine 
1 0 1
101
 please write out the chrecteristic table of your flip-flop on a piece of paper
 Iam assuming FF with 2 inputs and 2 states 

 The first two columns have been filled by the program in the order corresponding to q=0,q=1,q=2 and q=3 
 Enter the third column of the CHARECTERISTIC table 
 Enter M for the memory state and T for toggle state
 The order in which you enter the values is important
1 0 1 1

 0 0 1
 0 1 0
 1 0 1
 1 1 1count = 12

00110101
*/

/* my output Enter 1)The number of inputs 2)Number of states ,and 3)Number of outputs of the sequential state machine 1 0 1 101 please write out the chrecteristic table of your flip-flop on a piece of paper Iam assuming FF with 2 inputs and 2 states The first two columns have been filled by the program in the order corresponding to q=0,q=1,q=2 and q=3 Enter the third column of the CHARECTERISTIC table Enter M for the memory state and T for toggle state The order in which you enter the values is important 1 0 1 1 0 0 1 0 1 0 1 0 1 1 1 1count = 12 00110101 */