[C언어 #12] 배열의 합과 평균

C언어 배열의 합과 평균

ex. 총점 200점 이상인 사람들의 합과 평균

 

 

Average score

 

/* Average score */
#include <stdio.h>
 
int main() {
    int score[] = {211, 240, 189, 99, 312, 105, 22, 14, 659, 48,
                    140, 60, 121, 66, 841, 312, 123, 45, 554, 12,
                    32, 99, 151, 144, 141, 213, 288, 612, 147, 9 };
    int sum = 0;
    int len = sizeof(score) / sizeof(int);
    for (int i = 0; i < len; i++) {
        if (score[i] >= 200) {
            sum += score[i];
        }
    }
    double average = (double) sum / len;
    printf("Sum of score: %d\n", sum);
    printf("Average of score: %lf\n", average);
}

 

 

Average Score (consider over 200)

 

/* Average Score (consider over 200) */
#include <stdio.h>
 
int main() {
    int score[] = {211, 240, 189, 99, 312, 105, 22, 14, 659, 48,
                    140, 60, 121, 66, 841, 312, 123, 45, 554, 12,
                    32, 99, 151, 144, 141, 213, 288, 612, 147, 9 };
    int sum = 0;
    int num = 0;
    int len = sizeof(score) / sizeof(int);
    for (int i = 0; i < len; i++) {
        if (score[i] >= 200) {
            sum += score[i];
            num ++;
        }
    }
    double average = (double) sum / num;
    printf("Number of score over 200: %d\n", num);
    printf("Sum of score over 200: %d\n", sum);
    printf("Average of score over 200: %lf\n", average);
}