산술연산자
+ -
* 곱하기
/ 나누기
% 나머지
printf("%d",a+b);
printf("%d",a-b);
printf("%d",a*b);
printf("%d",a/b);
printf("%d",a%b);
int a, b;
scanf("%d %d",&a, &b);
printf("%d",a+b);
return 0;
int -2147483648 ~ +2147483647
a -2147483648 ~ +2147483647
b -2147483648 ~ +2147483647
a+b -4294967296 ~ + 4294967294
int + int -> int
long long int + int -> long long int
강제형변환 -> 잠깐 바꾸기 (가면씌우기)
#include
int main()
{
int a, b;
scanf("%d %d",&a, &b);
printf("%u",(unsigned int)a+(long long int)b);
return 0;
}