C 연습 (1)

#include <stdio.h>

int main(){

    float sum = 0.0,avg = 0.0;

    int Good ,normal,fine,bad,num ,count;

    count = num = Good = normal = fine = bad = 0;

    scanf("%d",&num);

    while(num>0 && num<101){

        sum += num;

        count += 1;

        if(num >= 90){

           Good +=1;

        }else if(num>=80 && num<90){

           normal += 1;

        }else if(num >=70 && num <80){

           fine +=1;

        }else{

           bad +=1;

        }

        scanf("%d",&num);

    }

    avg = sum/count;



    printf("     %f
",avg);

    printf("   %f
",sum);

}

문제

#include <stdio.h>

void main(){

      int h,f,m,n;

      printf("      ");

      scanf("%d",&h);

      printf("       ");

      scanf("%d",&f);

      m=(4*h-f)/2;

      n=(f-2*h)/2;

      printf("  %d  ,%d   ",m,n);

}

 역서 수조
 

#include <stdio.h>

#define LONGTH 5 

void main(){

 

    int j,temp,array[] = {1,2,3,4,5};

    for(j=0;j<LONGTH/2;j++){

        temp = array[j];

        array[j] = array[LONGTH-j-1];

        array[LONGTH-j-1] = temp;

    }



    for(j=0;j<LONGTH;j++){

       printf("%d",array[j]);

    }



}