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Mouse cleaning time
C language learned by suffering
C language learned by suffering
Exercise 7
fundamental knowledge
Q1-1
What do you call a non-zero number when making a conditional decision?
Q 1-2
What do you call 0 when making a conditional decision?
Q1-3
What do you call combining multiple statements by enclosing them in {{}}?
program read-only
What is the next program to display?
Answer by judging from the process contents and variable names.
Answer by judging from the process contents and variable names.
Q2-1
#include <stdio.h>
int main(void)
{
int value, rest;
scanf("%d", &value);
rest = value % 2;
if (rest == 0) printf("E");
if (rest == 1) printf("O");
printf("\n");
return 0;
}program writing
Q3-1
Enter a year, and it will tell you whether the Olympics will be held in that year or not.
Create a program that displays
If possible, it would be better if it could distinguish between summer and winter.
Hint: The Sydney Olympics (summer) were held in 2000.
The conditions are complicated, so please use the following
Ignore the previous years when the summer and winter seasons were in the same year.
Create a program that displays
If possible, it would be better if it could distinguish between summer and winter.
Hint: The Sydney Olympics (summer) were held in 2000.
The conditions are complicated, so please use the following
Ignore the previous years when the summer and winter seasons were in the same year.
descriptive expression
Q4-1
if (-1) printf("OK\n");When you run the above program, you will see OK, but
Briefly explain why.
Basic Knowledge (sample answers)
Solution 1-1
true or true
Solution 1-2
false or false
Solution 1-3
Block or Double Sentence
Program reading (example solution)
Solution 2-1
Indicate whether the input value is odd or even.
O stands for odd and E for even.
The % calculates the remainder.
The last printf function is only for line breaking.
Program writing (example of solution)
Solution 3-1
#include <stdio.h>
int main(void)
{
int year;
printf("Please enter year of year:");
scanf("%d", &year);
if (year % 4 == 0) printf("Summer Olympics\n");
if (year % 2 == 0 && year % 4 ! = 0) printf("Winter Olympics\n");
if (year % 2 ! = 0) printf("No Olympics\n"); if (year % 2 == 0 && year % 4 !
return 0;
}*Here, the year the Olympics are held is divisible by two.
In addition, we took advantage of the fact that it is also divisible by 4 during the Summer Olympics.
*Other calculation methods are possible, so the answer is correct if it is obtained by calculation.
*If the years are compared as they are without calculation, the answer is incorrect.
Question
Short Answer Type (Sample Answer)
Solution 4-1
In an if statement, any number other than zero is considered true, so
Because it is executed even if the value is negative.
Because it is executed even if the value is negative.
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