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How can I reuse the inputted value for my second while loop?

+4 votes
asked Nov 18 by Lexus Guevara (560 points)
#include <stdio.h>

int main()
{
    int num1, num2, product = 0, quotient = 0, remainder = 0;
    
    printf("Input value for num1 : ");
    scanf("%d", &num1);
    printf("Input value for num2 : ");
    scanf("%d", &num2);
    
    while(num2){
        product += num1;
        num2--;
    }
    
    
    while(num1 >= num2){
        num1 = num1 - num2;
        quotient++;
    }
    
    printf("The product of %d and %d is : %d", num1, num2, product);
    printf("\nThe integer quotient of %d and %d is : %d", num1, num2, quotient);

    return 0;
}

1 Answer

0 votes
answered Nov 18 by ARTEMII KOZHEMIAK (540 points)
selected Nov 22 by Lexus Guevara
 
Best answer

As I see, you decrease num2 in the while loop. So if you want to reuse it, you have to not change it -- create a temporary variable that will store the value. 2 ways to do:

1) If you want to maintain your while loop: 

//add temp variable
int temp = num2;

while(temp){
        product += num1;
        temp--;
}

//if you want to save num1 as well
temp = num1;
while(temp >= num2){
        temp = temp - num2;
        quotient++;
}

2)I would suggest using for loops, since they allocate the variable on enter and deallocate on exit, thus less memory usage. Also more convenient:

//variable creation; boolean statement; changer

//our product
for(int temp = num2; temp; temp--){
    product += num1;
}

//our quotient
for(int temp = num1; temp>= num2; temp-=num2){//  temp -= <var> is equivalent to temp = temp - <var>
    quotient++;
}
    

commented Nov 19 by Lexus Guevara (560 points)
Thank you very much, I don't really understand the forloops that's why i used while loops. but atleast I understand now how to use the forloops. thankyou!
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