Question

Ques) Write a program in c, which meets the following requirements.

Requirements 1. Read integer values from stdin, separated by one or more spaces or newlines, until reaching EOF 2. The input is guaranteed to be well-formed. 3. The input contains no more than 80 values. 4. on standard output, render a simple vertical column graph representation of the input values, in order left to right, using hash'#' characters as shown in the examples below. The number of hashes printed in each column should be equal to the corresponding input value 5. The area above a completed column should be filled with space characters 6. Ignore empty lines. Do not output a column for an empty line 7. The entire graph must end with a newline character Guide Hint: you may find it helpful to draw your graphs upside down (increasing down the screen) first, then change your code to flip the output it up the right way Examples 1. Input: 11 3 1 Output The requirements mean that the graph fills a rectangular area with hashes and spaces, so this example is printed as In particular, notice the spaces before the newlines on the first two lines. They are necessary. 2. Input: 3 4 5 Output 3. Input: 0 304 5 Output Notice the empty columns that correspond to the zeros in the input, including the leading zero

Answer 1

Please find the hash graph program below,

Step 1:  userInputStream api uses File stdio stream to fetch the user input other EOF. It allocated heap memory dynamically for the user input values.

Step 2: strtok api is used to parse all the integer values stored in a string which is collected from Step 1.

Step 3: Rows and columns of a hash graph is collected from number of elements in num array and largest element in the num array.

Step 4: As per guidance from question, traverse the row and compare the element present in

num array and row value to print "#" else print " "

Program

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

/* Max input values */

#define MAX_LENGTH 80

/*This api uses File stdio stream to fetch the user input other EOF

and returns as a string*/

char *userInputStream(FILE* fp, size_t size){

char *str;

int ch;

size_t len = 0;

str = realloc(NULL, sizeof(char)*size);//size is start size

if(!str)return str;

while(EOF!=(ch=fgetc(fp))){

str[len++]=ch;

if(len==size){

str = realloc(str, sizeof(char)*(size+=16));

if(!str)return str;

}

}

str[len++]='';

return realloc(str, sizeof(char)*len);

}

int main(void){

char *usrStr;

char* token;

int k=0,i=0,num[MAX_LENGTH]={0,},j=0, column=0,row=0, largest=0, l=0;

  

printf("Enter the input string : ");

usrStr = userInputStream(stdin, 10);

//printf("%s ", usrStr);

/* Initialize all the 80 integers with -1 */

for(i=0; i<MAX_LENGTH; i++)

num[i]=-1;

  

i=0;

  

/* use Strtok to parse all the user input based on space and

new line characters which is stored as integers in num array*/

token = strtok(usrStr, " ");

while (token!= NULL) {

num[i++]=atoi(token);

token = strtok(NULL, " ");

}

  

/* Number of elements in the array represents the column */

column=i;

  

for (i = 0; i < MAX_LENGTH; i++)

{

//printf("-%d-",num[i]);

if(num[i] != -1)

{

if (largest < num[i])

{

largest = num[i];

}

}

}

/* Largest element in an array is row of the graph */

row=largest;

  

//printf(" %d %d ",row, column);

printf(" ");

  

/* As per guidance from question, traverse the row and compare the element present in

num array and row value to print "#" else print " " */

for(j=row; j >0 ; --j)

{

l=0;

for(k=0; k<column; k++)

{

if(num[l] >= j)

{

printf("#");

}

else

{

printf(" ");

}

l++;

}

printf(" ");

}  

/* free the dynamically allocated heap memory */

free(usrStr);

return 0;

}

Sample Output:

Enter the input atring: 4 12

nter the input string341 0 9 7