#include <stdio.h>
void main(){
int a=2, b;
while(a-- > 0) //2>0
printf("a = %d\n", a); //a = 2-1 = 1출력
for(b=0; b<2; b++) //b=0~1 (2번)
printf("a = %d\n", a++); //a = 1출력, a = 2출력
}
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