【課題２−３】
（プログラム例１）
#include
<stdio.h>
#define
N 10
int
main(void) {
int
i, score;
int
n_ok=0, n_ng=0; /* 合格者数、不合格者数を0で初期化 */
int
max=0, min=100; /* 最大値、最小値をそれぞれ十分小さな値、十分大きな値で初期化 */
int
sum=0; /*
合計を0で初期化 */
for
(i = 0; i < N; i++) {
printf("Input
score for student #%d: ", i+1);
scanf("%d",
&score); /* 得点入力 */
if
(score >= 60) { /*
60点以上なら */
n_ok++; /*
合格者数を+1 */
}
else { /*
60点未満なら */
n_ng++; /*
不合格者数を+1 */
}
if
(score > max) { /*
現時点での最大値より大なら */
max
= score; /* それを新たな最大値に */
}
if
(score < min) { /*
現時点での最小値より小なら */
min
= score; /* それを新たな最小値に */
}
sum
+= score; /*
合計に加える */
}
printf("number
of OKs: %d\n", n_ok);
printf("number
of NGs: %d\n", n_ng);
printf("max
score: %d\n", max);
printf("min
score: %d\n", min);
printf("average:
%4.1f\n", (float)sum/N);
return
0;
}
（実行例）
Input
score for student #1: 56<enter>
Input
score for student #2: 76<enter>
Input
score for student #3: 91<enter>
Input
score for student #4: 60<enter>
Input
score for student #5: 73<enter>
Input
score for student #6: 81<enter>
Input
score for student #7: 44<enter>
Input
score for student #8: 89<enter>
Input
score for student #9: 68<enter>
Input
score for student #10: 72<enter>
number
of OKs: 8
number
of NGs: 2
max
score: 91
min
score: 44
average:
71.0
（プログラム例２）
#include <stdio.h>
int main(void) {
int
cnt=0, score;
int
na=0, nb=0, nc=0, nd=0;
int
max=0, min=100;
int
sum=0;
while
(1) { /* 無限ループ */
printf("Input
score for student #%d: ", cnt+1);
scanf("%d",
&score); /* 得点入力 */
if
(score == 999) { /* 999なら終了 */
break;
}
if
((score < 0) || (score > 100)) {
/*
100より大きかったり、マイナスだったら、以下をスキップしループ先頭へ */
printf("Score
should be 0-100\n");
continue;
}
if
(score >= 80) { /*
80点以上ならA */
na++;
}
else if (score >= 70) { /* 70点以上80点未満ならB */
nb++;
}
else if (score >= 60) { /* 60点以上70点未満ならC */
nc++;
}
else { /*
60点未満ならD */
nd++;
}
if
(score > max) {
max
= score;
}
if
(score < min) {
min
= score;
}
sum
+= score;
cnt++; /*
入力人数をインクリメント */
}
printf("number
of students: %d\n", cnt);
printf("
number of As: %d\n", na);
printf("
number of Bs: %d\n", nb);
printf("
number of Cs: %d\n", nc);
printf("
number of Ds: %d\n", nd);
printf("max
score: %d\n", max);
printf("min
score: %d\n", min);
printf("average:
%4.1f\n", (float)sum/cnt);
return
0;
}
（実行例）
Input score for student #1:
76<enter>
Input score for student #2:
95<enter>
Input score for student #3:
55<enter>
Input score for student #4:
68<enter>
Input score for student #5:
40<enter>
Input score for student #6:
81<enter>
Input score for student #7:
123<enter>
Score should be 0-100
Input score for student #7:
62<enter>
Input score for student #8:
79<enter>
Input score for student #9:
88<enter>
Input score for student #10:
67<enter>
Input score for student #11:
-20<enter>
Score should be 0-100
Input score for student #11:
59<enter>
Input score for student #12:
72<enter>
Input score for student #13:
999<enter>
number of students: 12
number of As: 3
number of Bs: 3
number of Cs: 3
number of Ds: 3
max score: 95
min score: 40
average: 70.2