Question

Write a C program that prompts the user to enter a binary value, multiplies it by ten, then displays the result in binary. (“Binary” here means that the user communicates with the program in ones and zeros.) Your main function should

a) declare a char array,

b) call the readLn function to read from the keyboard

c) call a function to convert the input text string to an int

d) multiply the int by ten

e) call a function to convert the int to its corresponding binary text string,

f) call writeStr to display the resulting binary text string.

Answer 1

Code -

#include <stdio.h>
#include <math.h>
//read char array from keyboard
void readLn(char a[]){
printf("Enter binary number ");
scanf("%s",a);
}
//function to conver char array to string
int convertStringToInt(char a[]){

int x;
//sscanf is used to convert char array or string to integer
sscanf(a, "%d", &x);
return x;
}
//function to write output of bianry number multiply by 10
void writeStr(int binaryNum){
printf("\nBinary number x10 is %d",binaryNum);
}
//function to convert binary to decimal
int binaryToDeci( int num)
{
int deciNum = 0, i = 0, r;
while (num!=0)
{
r = num%10;
num /= 10;
deciNum += r*pow(2,i);
++i;
}
return deciNum;
}
//function to convert decimal to binary numer
int deciToBinary(int num)
{
int binaryNum = 0;
int r, i = 1;
while (num!=0)
{
r = num%2;
num /= 2;
binaryNum += r*i;
i *= 10;
}
return binaryNum;
}
int main()
{
//variable decalare
char a[10];
//read the input in array a
readLn(a);
//convert the string to int
int binaryNum = convertStringToInt(a);
//convert binary numbaer to integer
int decimalNum = binaryToDeci(binaryNum);
//multiply by decimal by 10
decimalNum = decimalNum * 10;
//convert decimal to binary number
binaryNum = deciToBinary(decimalNum);
//print the result multiply y 10
writeStr(binaryNum);

return 0;
}

Screenshots -