Question

#include <stdio.h>
#define MAX 8 //Byte = 8 bits

void func_and(int a[], int b[], int result[]) {
    for(int i=0; i < MAX; i = i + 1){
        result[i] = a[i] & b[i];
        }
    }

void func_or(int a[], int b[], int result[]) {
    for(int i=0; i < MAX; i = i + 1){
        result[i] = a[i] || b[i];
    }
}

void func_not(int a[], int result[]) {
    for (int i = 0; i < MAX; i = i + 1) {
        result[i] = !a[i];
    }
}

void func_1s_comp(int a[], int result[]) {
    for (int i = 0; i < MAX; i = i + 1) {
        result[i] = !a[i];
    }
}

void func_2s_comp(int a[], int result[]) {

    for (int i = 0; i < MAX; i = i + 1) {

        result[i] = !a[i];

        if(result[i] == '1' && carry == 1)
        {
            compTwo[i] = '0';
        }
        else if(result[i] == '0' && carry == ddd1)
        {
            compTwo[i] = '1';
            carry = 0;
        }
        else
        {
            compTwo[i] = result[i];
        }

        compTwo[MAX] = '\0';
    }
}


int main(void) {

    int choice;
    int carry = 1;
    int compTwo[];
    int x[MAX];
    int y[MAX];
    int z[MAX];

    do {

        printf("Enter the command number: \n0. Exit\n1. AND\n2. OR\n3. NOT\n4. 1's complement\n5. 2's complement\n6. 2's complement*\n");
        scanf("%d", &choice);

        switch (choice) {

            case 0: //Exit

                break;

            case 1: //AND

                printf("Enter the first binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &x[i]);
                }

                printf("Enter the second binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &y[i]);
                }

                func_and(x, y, z);

                printf("The first number AND second binary yield: ");
                for (int i = 0; i < MAX; i = i + 1) {
                    printf("%d", z[i]);
                }
                printf("\n");

            case 2: //OR

                printf("Enter the first binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &x[i]);
                }

                printf("Enter the second binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &y[i]);
                }

                func_or(x, y, z);

                printf("The first number OR second binary yield: ");
                for (int i = 0; i < MAX; i = i + 1) {
                    printf("%d", z[i]);
                }
                printf("\n");

            case 3: //NOT

                printf("Enter the binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &x[i]);
                }

                    func_not(x, z);

                    printf("The NOT for this number is: ");
                    for (int i = 0; i < MAX; i = i + 1) {
                        printf("%d", z[i]);
                    }
                    printf("\n");


            case 4: //1's complement

                printf("Enter the binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &x[i]);
                }

                func_1s_comp(x, z);

                printf("The 1st complement of this binary number is: ");
                for (int i = 0; i < MAX; i = i + 1) {
                    printf("%d", z[i]);
                }
                printf("\n");


            case 5://2's complement

                printf("Enter the binary number: \n");
                for (int i = 0; i < MAX; i = i + 1) {
                    scanf("%d", &x[i]);
                }

                func_2s_comp(x, z);

                printf("The 2nd complement of this binary number is: ");
                for (int i = 0; i < MAX; i = i + 1) {
                    printf("%d", z[i]);
                }
                printf("\n");

            case 6://2's complement*
                        break;
                }
        }

        while (choice != 0);

        return 0;
}

I just have to add 2's complemenet and 2* complement which in the 2 functions which I dont know how to do. 2* complement is "Start from the right to left until you see digit 1, then pass it and NOT the digits after that. For instance, 2’s complement of 110100 is 001100"

Answer 1

/*First of all I think you have mistaken in declaring variables as comptwo[] is declared in main() but you used it in

func_2s_comp() it will show error so try declaring those variables globally or use similar variable in other functions.*/

/*I am going with the defination you provided for 2s* complement*/

//I am writing this complete sample code.

#include<stdio.h>
#define MAX 8
void main()
{ int i;
int a[MAX];
for(i=0;i<MAX;i++)
scanf("%d",&a[i]);
abc(a);
for(i=0;i<MAX;i++)
printf("%d",a[i]);

}

void abc(int bin[])//Function to calculate 2s *complement
{
int i,j;
//To get right most index where bit is 1
for(i=0;i<MAX;i++)
{
if(bin[MAX-1-i]==1)
{
i=MAX-1-i;
break;
}
}
//flipping all the bits to the left of rightmost 1
for(j=0;j<i;j++)
{
if(bin[j]==0)
bin[j]=1;
else
bin[j]=0;
}
}

void xyz(int bin[])//2s complement
{
int i,j;
//To get 1s complement
for(i=0;i<MAX;i++)
{
if(bin[i]==0)
    bin[i]=1;
else
    bin[i]=0;
}
//To get right most index where bit is 0
for(i=0;i<MAX;i++)
{
if(bin[MAX-1-i]==0)
    {
    i=MAX-1-i;
    break;
    }
}
bin[i]=1;//flipping rightmost 0

//flipping all the 1s to the right of rightmost 0
for(j=i+1;j<MAX;j++)
{
        bin[j]=0;
}
}
 

//OUTPUT

1. 2s * complement

2. 2s complement

//Thankyou