 I don’t know if it’s okay to post about C programming here.

But I’ve been stuck with this one problem my whole day.

And it’s making me frustrated that I want to punch thru the monitor What I’m trying to do is. input three numbers k , m , n.
and calculate the sum of all the multiples of k between m and n.

so it’s like m < multiple of k < n

int main (){

``````int i, k, m, n, sum = 0;

printf("Input 3 integers that are bigger than 1:   \n");
scanf("%d%d%d", &k, &m, &n);

for(i = 1; (i > m) && (i < n); ++i ){
if(i % k == 0)
sum += i;
}

printf("%d\n", sum);

return 0;
``````

}

output:
Input 3 integers that are bigger than 1:
3
6
20
0Program ended with exit code: 0

please help Thank you very much for your help I got a hint from your code.

And came up with this and it works.

#include <stdio.h>

int main (){

``````int i, k, m, n, sum = 0;

printf("Input 3 integers that are bigger than 1:   \n");

printf("input k:   ");
scanf("%d", &k);

printf("input m:   ");
scanf("%d", &m);

printf("input n:   ");
scanf("%d", &n);

for(i = ++m; i < n; ++i){
if(i % k == 0)
sum += i;
}

printf("%d\n", sum);

return 0;
``````

}

Why wouldn’t C programming take this bold part right here:

for(i = 1; (i > m) && (i < n); ++i ){
if(i % k == 0)
sum += i;
}

omg… I thought if

i was smaller than m, it would just keep getting bigger and bigger until it was finally bigger than m.

and start adding to the sum.

thanks!

you saved my life

Awesome!

Thanks for your time and help.

Really Appreciate it. I remain ever confused. Was gonna jump into C++ but found fcc instead.

Yea. C++ has been on my mind for quite some time now. I really want to make games and after getting so far in javascript, it seems like a bad idea to try to learn C++ at the same time.