01: #include <stdio.h>
02:
03: float triangle(float b, float h);
04:
05: int main(void)
06: {
07: float teihen, takasa, menseki;
08:
09: printf("底辺：");
10: scanf("%f", &teihen);
11: printf("高さ：");
12: scanf("%f", &takasa);
13:
14: menseki = triangle(teihen, takasa);
15: printf("面積：%f\n", menseki);
16:
17: return 0;
18: }
19:
20: float triangle(float b, float h) //底辺：base, 高さ：height
21: {
22: return b * h / 2;
23: }