Question

Write a C program that counts the number of each digit entered by the user (Input process should be ended using EOF character). You should use switch to compute the number of each digits. For each digit your program should print a line containing that number of adjacent asterisks. Sample Input1: 18218342850056D855599 Sample Outputi: 0** 3° 5*** 6° 7 g*** Sample Input: 77777445521056 Sample Output2: 0* 1 2° 3 45 S. 6° 8 9 Sample Output 3: Sample Input3: 782222231567799988001332092555 0*** 3*** 4 5*** 6°

Answer 1

/*C program that prompts user to enter a line of text
from keyboard and then press enter key then print
the characters in the text and its corresponding count
as stars on the console window.*/
//main.c
#include<stdio.h>
#include<conio.h>
//main function starts
int main()
{
   //declare an array to count each number
   int counter[10]={0,0,0,0,0,0,0,0,0,0};
   int c;
   int index;
   int i;

   //read each character until new line or end of line(^z)
   while (true)
   {
       c=getchar();
       if (c=='\n' || c==EOF)
           break;
       else
       {
           //switch case to count each corresponding number
           switch(c)
           {
           case '0':counter[0]++;break;
           case '1':counter[1]++;break;
           case '2':counter[2]++;break;
           case '3':counter[3]++;break;
           case '4':counter[4]++;break;
           case '5':counter[5]++;break;
           case '6':counter[6]++;break;
           case '7':counter[7]++;break;
           case '8':counter[8]++;break;
           case '9':counter[9]++;break;
           }
       }
   }
   //print the histogram of starts
   for(index=0;index<10;index++)
   {
       printf("%d",index);
       for(i=0;i<counter[index];i++)
           printf("%c",'*');
       printf("\n");
   }

   /*pause program output on console
   until user enters any key on keyboard*/
   getch();
   return 0;
}

-----------------------------Sample Ouptut1-------------------------------------------

182183428500560855599 10*** 1秒 2** 134 4* ***** 6* 7 8**** 9

-----------------------------Sample Ouptut2-------------------------------------------

77777445521056 104 1* 2* 3 4** 5*** 6 7***** 8 6

-----------------------------Sample Ouptut3-------------------------------------------

782222222315677999880001332092555 10米 1 2******* 3*** 4 5**** |6 7 |8林 19****