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- #include <stdio.h>
- #include <math.h>
- #include <stdlib.h>
- int main(void)
- {
- int n = 0,
- sum = 0,
- c = 0,
- i;
- printf("Indtast n\n");
- scanf("%d", &n );
- for (i = 0; i <= n; i++) {
- sum += i;
- }
- printf("Summen er %d\n", sum );
- c = (n + 1) * n / 2;
- printf("Sumto er %d\n", c );
- return 0;
- }
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