정올 104 : 출력-형성평가4

내 풀이:

#include<stdio.h>
int main(void){
    printf("%s %d\n","kor",90);
    printf("%s %d\n","mat",80);
    printf("%s %d\n","eng",100);
    printf("%s %d\n","sum",90+80+100);
    printf("%s %d\n","avg",(90+80+100)/3);
    return 0;
}