Question

In C language

The project should create a code maker. The computer version of this game uses digits 0-9 for the code. The feedback may be an array of characters using ‘b’ for black and ‘w’ for white.

1. The program should generate a code

i. First, generate random number from 0 to 9. Actually, generate 4 random numbers

ii. If any random number is repeated, replace the repeated number iii. Loop step ii until there is no repetition

2. The program should accept and interpret user input

i. Scan in user input as a number

ii. Separate the digits of the input by position, i.e. units, tens, etc

iii. Stick each digit into an array

3. The program should compare the input with the generated code

i. Check each member of the input array with code array

ii. If input array element matches EXACT member of output array, set a black (‘b’) in feedback array

iii. If input array element matches ANY member of output array, set a white (‘w’) in feedback array

4. The program should give feedback

i. Output the feedback array element by element in the same line

5. Exit conditions i. If all feedback array elements are ‘b’, exit success

ii. If max tries exceeded, exit failure

Answer 1

The following code satisfies all the requirements: Thumbs Up please if this helps :)
#include <stdio.h>
#include <stdlib.h>
#include<time.h>

static char feedback[4]={'_','_','_','_'};
int randomNum()
{
return (rand()%9);

}
int main()
{
int i=0,j,rem=0,temp;
int flag=20;
int input[4]={0,0,0,0},output[4],n;
srand(time(0));
while(flag>0)
{
input[0] = randomNum();
input[1] = randomNum();
while(input[0] == input[1])
{
input[1] = randomNum();
}
input[2] = randomNum();
while(input[0] == input[2] || input[1] == input[2])
{
input[2] = randomNum();
}
input[3] = randomNum();
while(input[0] == input[3] || input[1] == input[3] || input[2] == input[3])
{
input[3] = randomNum();
}
printf("Enter a 4 digit Number : ");
scanf("%d",&n);
temp = n;
  
for(i=0;i<4;i++)
{
rem= temp%10;
output[i] = rem;
temp/=10;
}
  
//checking
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
if(input[i]==output[j])
{
if(i != j && feedback[i] != 'b')
{
feedback[i] = 'w';   
}
else
{
feedback[i] = 'b';
}
}
  
}
}
//giving feedback
for(i=0;i<4;i++)
{
printf(" %c ",feedback[i]);
}
  
printf("\n");
if(feedback[0] == 'b' &&
feedback[1] == 'b'&&
feedback[2] == 'b'&&
feedback[3] == 'b')
{
exit(0);
}
flag--;
}
printf("FAILURE");
}

OUTPUT:

test case 1 :

test Case 2 :