쉽게 풀어쓴 C언어 express 10장 연습문제

1번

#include <stdio.h>

 

int main()

{

int day[12] = { 31,29,31,30,31,30,31,31,30,31,30,31 };

int i;

for (i = 1; i < 13; i++)

{

printf("%d월은%3d일까지 있습니다.\n", i, day[i - 1]);

}

return 0;

}

 

 

 

 

 

 

2.

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

int main()

{

int x[10], i, min, max;

srand((unsigned)time(NULL));

for (i = 0; i < 10; i++)

x[i] = rand();

min = x[0];

max = x[0];

for (i = 0; i < 10; i++)

{

if (x[i] < min)

min = x[i];

if (x[i] > max)

max = x[i];

}

printf("최대값은%d 최소값은%d입니다.\n", max, min);

return 0;

}

 

 

 

 

 

3.

#include <stdio.h>

 

int array_equal(int a[], int b[], int size)

{

int i;

for (i = 0; i < size i++)

{

if (a[i] != b[i])

return 0;

}

return 1;

}

int main()

{

int a[10], b[10], i, result;

printf("배열a의원소를입력하시오(크기는10) : ");

for (i = 0; i<10; i++)

scanf("%d", a+i);

printf("배열b의원소를입력하시오(크기는10) : ");

for (i = 0; i<10; i++)

scanf("%d", b+i);

result = array_equal(a, b, 10);

if (result == 0)

printf("두배열은다릅니다.\n");

else

printf("두배열은같습니다.\n");

}

 

 

 

 

 

4.

#include <stdio.h>

 

int array_copy(int a[], int b[], int size)

{

int i;

for (i = 0; i < 10; i++)

b[i] = a[i];

for (i = 0; i < size i++)

{

if (a[i] != b[i])

return 0;

}

}

int main()

{

int a[10], b[10], i, result;

printf("배열a의원소를입력하시오(크기는10) : ");

for (i = 0; i<10; i++)

scanf("%d", a+i);

result = array_copy(a, b, 10);

if (result == 0)

printf("두배열은다릅니다.\n");

printf("배열b:");

for (i = 0; i < 10; i++)

printf("%d ", b[i]);

}

 

 

 

 

5.

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

 

int main()

{

int i, x, arr[10] = { 0 };

srand((unsigned)time(NULL));

for (i = 0; i<100; i++)

{

x = rand() % 10;

if (x == 0)

arr[0]++;

else if (x == 1)

arr[1]++;

else if (x == 2)

arr[2]++;

else if (x == 3)

arr[3]++;

else if (x == 4)

arr[4]++;

else if (x == 5)

arr[5]++;

else if (x == 6)

arr[6]++;

else if (x == 7)

arr[7]++;

else if (x == 8)

arr[8]++;

else

arr[9]++;

}

for (i = 0; i<10; i++)

printf("%d는%d번\n", i + 1, arr[i]);

}

 

 

 

 

6.

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

 

int main()

{

srand((unsigned)time(NULL));

int arr[3][5] = {0};

int i,j,sum=0;

for (i = 0; i < 3; i++)

{

for (j = 0; j < 5; j++)

{

arr[i][j] = rand() % 99 + 1;

}

}

for (i = 0; i < 3; i++)

{

for (j = 0; j < 5; j++)

{

sum += arr[i][j];

printf("%4d", arr[i][j]);

}

printf("%4d\n", sum);

sum = 0;

}

for (j = 0; j < 5; j++)

{

for (i = 0; i < 3; i++)

{

sum += arr[i][j];

}

printf("%4d",sum);

sum = 0;

}

printf("\n");

return 0;

}

 

 

 

7.

#include <stdio.h>

#include <math.h>

 

int search(int f)

{

int i,s;

for (i = 1; i < 11; i++)

{

s = pow(i, 3);

if (f == s)

printf("%d의세제곱근은%d", f, i);

}

if (f != s)

return 1;

}

 

int main()

{

int arr[3][10] = {

{1,2,3,4,5,6,7,8,9,10}

};

int i, j,f;

for (j = 0; j < 10; j++)

{

printf("%5d", arr[0][j]);

}

printf("\n");

for (i = 1; i < 3; i++)

{

for (j = 0; j < 10; j++)

{

arr[i][j] = pow(j+1,i+1);

printf("%5d", arr[i][j]);

}

printf("\n");

}

printf("정수를입력하시오:");

scanf("%d",&f);

search(f);

if (search(f) == 1)

printf("잘못입력하셨습니다.");

printf("\n");

return 0;

}

 

 

 

 

8.

#include <stdio.h>

#include <math.h>

#define size 10

double ave(double m);

double dev(double v);

int arr[size] = { 0 };

double m,v;

int main()

{

int i;

for (i = 0; i < size i++)

{

printf("데이터를입력하시오:");

scanf("%d", &arr[i]);

}

printf("평균값은%f\n", ave(m));

printf("표준편차값은%f\n", dev(v));

}

double ave()//평균구하는함수

{

int i;

double sum=0.0;

for (i = 0; i < size i++)

sum += arr[i];

m = sum / size

return m;

}

double dev()//표준편차구하는함수

{

int i;

double sum = 0.0;

for (i = 0; i < size i++)

{

sum = pow(arr[i] - m, 2);

v += sum / size

}

v = sqrt(v);

return v;

}

 

 

 

 

9.

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

 

int main()

{

int arr[10][4] = { 0 };

int i, j, max, min;

 

srand((unsigned)time(NULL));

for (i = 0; i < 10; i++)

{

for (j = 0; j < 4; j++)

{

if (j == 0)

arr[i][j] = i + 1;

else

arr[i][j] = rand() % 99 + 1;

 

printf("%4d", arr[i][j]);

}

printf("\n");

}

for (i = 1; i < 4; i++)

{

max = arr[i][1];

min = arr[i][1];

for (j = 1; j < 10; j++)

{

if (max < arr[j][i])

max = arr[j][i];

else if (min>arr[j][i])

min = arr[j][i];

}

printf("%02d시험의최대값: %3d과최소값:%3d\n", i, max, min);

}

return 0;

}

 

 

 

10.

a.

#include <stdio.h>

int vector_add(double x[], double y[], double z[]);

int main()

{

double a[3], b[3], c[3];

int i;

for (i = 0; i < 3; i++)

{

printf("x %d좌표의값을입력하시오:", i);

scanf("%lf", &a[i]);

printf("y %d좌표의값을입력하시오:", i);

scanf("%lf", &b[i]);

}

vector_add(a, b, c);

return 0;

}

int vector_add(double x[], double y[], double z[])

{

int i;

printf("결과값:");

for (i = 0; i < 3; i++)

{

z[i] = x[i] + y[i];

printf("%f ", z[i]);

}

printf("\n");

}

 

 

b.

#include <stdio.h>

double vector_dot_prod(double x[], double y[]);

double result;

int main()

{

double a[3], b[3];

int i;

for (i = 0; i < 3; i++)

{

printf("x %d좌표의값을입력하시오:", i);

scanf("%lf", &a[i]);

printf("y %d좌표의값을입력하시오:", i);

scanf("%lf", &b[i]);

}

vector_dot_prod(a, b);

return 0;

}

double vector_dot_prod(double x[], double y[])

{

int i;

double dot;

printf("결과값:");

for (i = 0; i < 3; i++)

{

dot = x[i] * y[i];

result += dot;

}

printf("%f", result);

printf("\n");

return result;

}

 

 

 

 

11.

#include <stdio.h>

int main()

{

int s[10] = { 1,1,2,2,3,3,4,4,5,5};

int i;

while (1)

{

printf("찾는상품번호를입력하시오(1~10):");

scanf("%d", &i);

printf("%d장소에저장되어있음\n", s[i - 1]);

}

return 0;

}

 

 

 

12.

a.

#include <stdio.h>

int s_m(int a[][3], int s);

int arr[3][3] = { { 1,2,3 },{ 4,5,6 },{ 7,8,9 } };

int main()

{

int i, j;

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

printf("%d ", arr[i][j]);

}

printf("\n");

}

s_m(arr, 2);

}

int s_m(int a[][3], int s)

{

int i, j;

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

a[i][j] *= s

}

}

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

printf("%3d ", arr[i][j]);

}

printf("\n");

}

return 0;

}

 

 

 

b.

#include <stdio.h>

int transpose(int a[][3], int b[][3]);

int arr[3][3] = { { 1,2,3 },{ 4,5,6 },{ 7,8,9 } };

int ar[3][3];

int main()

{

int i, j;

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

printf("%d ", arr[i][j]);

}

printf("\n");

}

transpose(arr, ar);

}

int transpose(int a[][3], int b[][3])

{

int i, j;

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

b[j][i] = a[i][j];

}

}

for (i = 0; i < 3; i++)

{

for (j = 0; j < 3; j++)

{

printf("%3d ", ar[i][j]);

}

printf("\n");

}

return 0;

}

 

 

 

13.

#include <stdio.h>

int main()

{

int i, n;

int binary[32];

printf("10진수입력:");

scanf("%d", &n);

for (i = 0; i <= n; i++)

{

binary[i] = n % 2;

n /= 2;

}

printf("변환된2진수:");

for (i--; i >= 0; i--)

printf("%d", binary[i]);

printf("\n");

}

 

2016/09/25 - [소스코드] - 쉽게 풀어쓴 C언어 express 9장 연습문제

2016/09/24 - [소스코드] - 쉽게 풀어쓴 C언어 express 8장 연습문제

2016/09/24 - [소스코드] - 쉽게 풀어쓴 C언어 express 7장 연습문제