Practice Problem 11

#include <stdio.h>

int tri(int, int);

int main(void)
{
    int side, high, square;

    scanf("%d,%d", &side, &high);
    printf("%d\n", tri(side, high));

    return 0;
}

int tri(int side, int high)
{
    return side * high / 2;
}

Program Manual

Question 3-1

Write a program that takes a year as input and displays whether or not the Olympics were held in that year.
However, the section calculating the Olympic Games should be created as a separate function.

"The first tournament was held in the summer of 2000, and subsequent tournaments are scheduled to be held every two years, alternating between winter and summer."
And let's make sure this schedule stays locked in.

descriptive

Question 4-1

Briefly explain the purpose of creating functions.

Fundamentals (Answer Key)

Solution 1-1

Prototype Declaration

Solution 1-2

default argument

Solution 1-3

actual arguments

Solution 1-4

return value

Program Reading (Solution Example)

Solution 2-1

A function to calculate the area of a triangle.

Program Documentation (Example Solution)

Solution 3-1

#include <stdio.h>

int olympic(int year);

int main(void)
{
    int year, hold;

    scanf("%d", &year);
    hold = olympic(year);

    switch (hold) {
    case 0:
        printf("開かれない\n");
        break;
    case 1:
        printf("夏季五輪\n");
        break;
    case 2:
        printf("冬季五輪\n");
        break;
    };

    return 0;
}

int olympic(int year)
{
    if (year % 2 == 0) {
        if (year % 4 == 0) {
            return 1;
        } else {
            return 2;
        }
    } else {
        return 0;
    }
}

"The return value of the Olympic function is linked to the event."
Please be mindful of declaring prototypes.

descriptive (answer)

Solution 4-1

機能別にfunctionを作り、それを組み合わせることでプログラム全体が完成し、
to make it easier to build even large programs.

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