help on calculator program

guint76 (2)
i'm trying to make a basic calculator in c++ and i wrote a script but i can't seem to find the problem could someone please help me on this one
the full source code:
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#include <cstdlib>
#include <iostream>
#include <string>
#include <iomanip>
#include <sstream>
#include <conio.h>
using namespace std;
void calculator () {
    int start = 0;  
    int start2 = 0;   
    cout<<"_________________________________\n                                 |\n   _________________________     |\n  |                         |    |\n  |"<< setw(25) <<start<<"|    |\n   -------------------------     |\n                                 |\n                                 |\n                                 |\n        1       2       3        |\n                                 |\n                                 |\n        4       5       6        |\n                                 |\n                                 |\n        7       8       9        |\n                                 |\n                                 |\n                0                |\n                                 |\n        +   -   \\   *   =        |\n                                 |\n_________________________________|\n";
    int a = 1;
    int b = 1;
    while (a=b){
    char read1[7];
    char read2[7];
    string numb (read2);
    istringstream h (numb);
    int number1;
    int number2;
    int total;
    string number (read1);
    istringstream g (number);
    char sign;
    while (read1[start] != '+' && read1[start] != '*' && read1[start] != '-' && read1[start] != '/'){
          if (start != 8){
    read1[start] = getch();
    g >> number1;
    system("cls");
    cout<<"_________________________________\n                                 |\n   _________________________     |\n  |                         |    |\n  |"<< setw(25) <<number1<<"|    |\n   -------------------------     |\n                                 |\n                                 |\n                                 |\n        1       2       3        |\n                                 |\n                                 |\n        4       5       6        |\n                                 |\n                                 |\n        7       8       9        |\n                                 |\n                                 |\n                0                |\n                                 |\n        +   -   \\   *   =        |\n                                 |\n_________________________________|\n";
    start++;
}
    else if (start == 8){
    break;
}
}
    system("cls");
    cout<<"_________________________________\n                                 |\n   _________________________     |\n  |                         |    |\n  |"<< setw(25) <<read1[start]<<"|    |\n   -------------------------     |\n                                 |\n                                 |\n                                 |\n        1       2       3        |\n                                 |\n                                 |\n        4       5       6        |\n                                 |\n                                 |\n        7       8       9        |\n                                 |\n                                 |\n                0                |\n                                 |\n        +   -   \\   *   =        |\n                                 |\n_________________________________|\n";
 while (read2[start2] != '+' && read2[start2] != '*' && read2[start2] != '-' && read2[start2] != '/'){
          if (start2 != 8){
    read2[start] = getch();
    h >> number2;
    system("cls");
    cout<<"_________________________________\n                                 |\n   _________________________     |\n  |                         |    |\n  |"<< setw(25) <<number1<<"|    |\n   -------------------------     |\n                                 |\n                                 |\n                                 |\n        1       2       3        |\n                                 |\n                                 |\n        4       5       6        |\n                                 |\n                                 |\n        7       8       9        |\n                                 |\n                                 |\n                0                |\n                                 |\n        +   -   \\   *   =        |\n                                 |\n_________________________________|\n";
    start2++;
}
    else if (start2 == 8){
    break;
}}
    if(read1[start]=='+'){
                  total=number1+number2;
                  }
    else if (read1[start] =='-'){
         total=number1-number2;
         }
    else if (read1[start] =='/'){
         total=number1/number2;
         }
    else if (read1[start] =='*'){
         total=number1*number2;
         }
    else {
         total=0;
         }
    system("cls");
    cout<<"_________________________________\n                                 |\n   _________________________     |\n  |                         |    |\n  |"<< setw(25) <<total<<"|    |\n   -------------------------     |\n                                 |\n                                 |\n                                 |\n        1       2       3        |\n                                 |\n                                 |\n        4       5       6        |\n                                 |\n                                 |\n        7       8       9        |\n                                 |\n                                 |\n                0                |\n                                 |\n        +   -   \\   *   =        |\n                                 |\n_________________________________|\n";
    
}
calculator();
}
int main(int argc, char *argv[])
{
    calculator();
    system("PAUSE");
    return EXIT_SUCCESS;
}
guint76 (2)
i started over and rewrote the entire program differently and it works now
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