#include <stdio.h>

int main() {
    int total=0;
    int i, num;
    printf("0부터 num까지의 덧셈, num은? ");
    scanf("%d", &num);

    for(i=0; i<num+1; i++)
        total+=i; // total=total+i;

    printf("0부터 %d까지 덧셈결과:%d \n", num, total);
    return 0;
}

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