Note, TUHS probably isn't the *best* forum to ask for help with basic C
programs. :-)

That said, I suspect you mis-transcribed the program and that the line,
`sum = sum + 1;` should be `sum = sum + i;`, or more idiomatically, `sum +=
i;`.  Indeed, the whole program could be written:

#include <stdio.h>

int
main(void)
{
        int i, sum = 0;
        for (i = 1; i <= 100; i++)
                sum += i;
        printf("%d\n", sum);
        return 0;
}

If you're using a C99 or later compiler, you can be slightly more succinct:

#include <stdio.h>

int
main(void)
{
        int sum = 0;
        for (int i = 1; i <= 100; i++)
                sum += i;
        printf("%d\n", sum);
        return 0;
}

Hope that helps!

       - Dan C.


On Wed, Aug 22, 2018 at 8:17 AM cc <caipenghui_c@163.com> wrote:

> Hello everyone
>
> I had a problem compiling a piece of c code from the book. The result of
> running the book is 5050, but the compiler is 100. I don't know which is
> right, please help me to see which is wrong. Thank you very much!
>
> #include <stdio.h>
>
> int main(void)
> {
>        int i, sum = 0;
>        i = 1;
>        while ( i <= 100) {
>        sum = sum + 1;
>        i++;
>        }
>        printf("%d\n", sum)
>        return 0;
> }
>
>
>
> cc
> 邮箱：caipenghui_c@163.com
>
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>
> 签名由 网易邮箱大师 <https://mail.163.com/dashi/dlpro.html?from=mail88> 定制
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