Question

C PROGRAM ONLY! You should make two functions.

Prototypes are included in loops.h. :

#ifndef FUNCTIONS_H
#define FUNCTIONS_H

void mult_table(int n);
int num_digits(int n);

#endif

mult_table should accept an integer. It should PRINT the multiplication table for that number up to 10.

Example: if N was 3, your function should PRINT
3 * 1 = 3
3 * 2 = 6
3 * 3 = 9
...
3 * 10 = 30

num_digits should accept an integer. It should RETURN the number of digits in that number.

Example: if N was 124, your function should RETURN 3, since there are 3 digits in the number.

Answer 1

Here is the C code to the given question.

The two functions mult_table and num_digits are completed and tested in main().

Sample output is added at the end.

Code:

#include <stdio.h>

void mult_table(int n){
    
    for(int i=1;i<=10;i++){    /*runs the loop from i=1 to i=10*/
        
        printf("%d * %d = %d\n",n,i,n*i);   /*prints the present value of table*/
        
    }
}

int num_digits(int n){
    
    int numOfDigits=0;     /*initializes numOfDigits to 0*/
    
    if(n<0){     /*check if the number is negative*/
        n=0-n;   /*change n to positive*/
    }
    
    while(n>0){   /*runs the loop as long as n is greater than 0*/
        
        n=n/10;   /*divides n by 10*/
        numOfDigits+=1;       /*increments numOfDigits by 1*/
    }
    
    if(numOfDigits==0){     /*special case where the number passed to function is 0*/
        return 1;   /*returns 1*/
    }
    else{
        return numOfDigits;  /*returns numOfDigits*/
    }
}

int main()
{
    printf("Testing mult_table:\n");
    mult_table(3);
    
    printf("\nTesting num_digits\n%d",num_digits(124));
    return 0;
}

Output: