write a program that prompts the user to input a positive integer , if the user enters zero or a negative value for nu, it prompts user to input num again and repets this process untill unser inputs a correct value. it then display the sum of the numbers 1 to num

i am having difficulties to do the loop on how the program will check whether the entered num is 0 or negative...

Edited 3 Years Ago by nitish.mohiputlall: i did not ask my question clealy

First off, we don't do other people's homework for them. Second, we don't do other people's homework for them. And third, we don't do other people's homework for them. Sensing a pattern here yet?

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Now, if you actually don't know how to create a program that fits the requirements... hmmmn. Reading the book is definitely called for. As is speaking to the professor; while some can be a--holes about office hours, most are more than willing to give extra help, if only to keep their class grades from slipping to the point where they get re-assigned to teach remedial basketweaving.

i am sorry though i did not put my question right i am having difficulties to do the loop on how the program will check whether the entered num is 0 or negative...

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int x=2;
    int num;
    printf("enter a value: ");
    scanf("%d", &num);
    while((num%x!=0)&(num!=x)){
        printf("Enter another number: ");
        scanf("%d", &num);

    }


    system("pause");
    return 1;

}

sample of my codes

Edited 3 Years Ago by nitish.mohiputlall: wrong code was written

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int x=2;
    int num;
    printf("enter a value: ");
    scanf("%d", &num);
    while((num%x!=0)&(num!=x)){
        printf("Enter another number: ");
        scanf("%d", &num);

    }


    system("pause");
    return 1;

}

The program would be better if you used a do loop instead of while loop. And you don't need to use the mod % operator in this program like you did in your other program.

start of loop
   display prompt to enter a number
   call scanf() to get the number in variable named N.
if number is <= 0 then go back to start of loop

print the sum of all numbers from 1 to N.  You need another loop for this

Edited 3 Years Ago by Ancient Dragon

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int num, i;
    int sum=0;
    do{
        printf("enter a number: ");
        scanf("%d", &num);
    }
    while(num<=0);
    if(num<=0){
        printf("enter another value: ");
        scanf("%d", &num);
        }
    for(i=1;i<num;i++){
        sum=sum+num;
        }
    printf("%d", sum);

    system("pause");
    return 1;

}

i end up with this final code :)

Edited 3 Years Ago by nitish.mohiputlall: wrong digit was entered

Run the program and find out if it works correctly or not.

line 11 has a semicolon at the end -- remove the semicolon

The if statement on line 12 is not needed so you should delete it. The while should look like this:

while( <condition here> )
{
   // code here
}

Your for loop on line 16 should look like:

for( i=1; i<=num; i++)
{
    sum=sum+num;
}

Edited 3 Years Ago by ddanbe: addition

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