ex6-1.c
/* code: ex6-1.c (v1.20.00) */
#include <stdio.h>
int main () {
int a, b, c, d, e;
int sum, avg;
a = 30;
b = 20;
c = 10;
d = 25;
e = 15;
sum = a + b + c + d + e;
avg = sum / 5;
printf ("%d\n", avg);
return 0;
}
ex6-10.c
/* code: ex6-10.c (v1.20.00) */
#include <stdio.h>
#include <string.h>
int main () {
char s0[] = "aaaaa";
char s1[] = "bbbbb";
char s2[] = "aaaaaaa";
int i;
printf ("strcmp(str1, str2)\n");
i = strcmp (s0, s0);
printf ("[%s] [%s] (%d)\n", s0, s0, i);
i = strcmp (s0, s1);
printf ("[%s] [%s] (%d)\n", s0, s1, i);
i = strcmp (s1, s0);
printf ("[%s] [%s] (%d)\n", s1, s0, i);
i = strcmp (s0, s2);
printf ("[%s] [%s] (%d)\n", s0, s2, i);
return 0;
}
ex6-2.c
/* code: ex6-2.c (v1.20.00) */
#include <stdio.h>
int main () {
int a[10];
int i, sum, avg;
a[0] = 30;
a[1] = 20;
a[2] = 10;
a[3] = 25;
a[4] = 15;
sum = 0;
for (i = 0; i < 5; i++)
sum += a[i];
avg = sum / 5;
printf ("%d\n", avg);
return 0;
}
ex6-3.c
/* code: ex6-3.c (v1.20.00) */
#include <stdio.h>
int main () {
int a[10] = { 30, 20, 10, 25, 15 };
int i, sum, avg;
sum = 0;
for (i = 0; i < 5; i++)
sum += a[i];
avg = sum / 5;
printf ("%d\n", avg);
return 0;
}
ex6-4.c
/* code: ex6-4.c (v1.20.00) */
#include <stdio.h>
#include <stdlib.h>
#define ARRAY_SIZE 10
int main () {
int a[ARRAY_SIZE];
int i;
for (i = 0; i < ARRAY_SIZE; i++)
a[i] = rand () % 100;
for (i = 0; i < ARRAY_SIZE; i++)
printf ("%03d ", a[i]);
return 0;
}
ex6-5.c
/* code: ex6-5.c (v1.20.00) */
#include <stdio.h>
int main () {
int i, j;
int a[3][4] = {
{0, 10, 20, 30},
{40, 50, 60, 70},
{80, 90, 100, 110}
};
for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++) {
printf ("array[%d][%d]=%3d\n", i, j, a[i][j]);
}
}
return 0;
}
ex6-6.c
/* code: ex6-6.c (v1.20.00) */
#include <stdio.h>
int main () {
int i, j, k;
int a[2][3][4] = {
{{0, 1, 2, 3},
{4, 5, 6, 7},
{8, 9, 10, 11}},
{{0, 10, 20, 30},
{40, 50, 60, 70},
{80, 90, 100, 110}}
};
for (i = 0; i < 2; i++) {
for (j = 0; j < 3; j++) {
for (k = 0; k < 4; k++) {
printf ("array[%d][%d][%d]=%3d\n", i, j, k, a[i][j][k]);
}
}
}
return 0;
}
ex6-7.c
/* code: ex6-7.c (v1.20.00) */
#include <stdio.h>
int main () {
char s[4];
s[0] = 'O';
s[1] = 'U';
s[2] = 'J';
s[3] = '\0';
printf ("%s\n", s);
return 0;
}
ex6-8.c
/* code: ex6-8.c (v1.20.00) */
#include <stdio.h>
/* ------------------------------------------- */
void string_copy (char *target, char *source) {
int i;
i = 0;
while (source[i] != '\0') {
target[i] = source[i];
i++;
}
target[i] = '\0';
}
/* ------------------------------------------- */
int main () {
char s[20] = "University";
char t[20];
string_copy (t, s);
printf ("%s\n", t);
return 0;
}
ex6-9.c
/* code: ex6-9.c (v1.20.00) */
#include <stdio.h>
#include <string.h>
/* ------------------------------------------- */
int main () {
char s[20] = "University";
char t[20];
strcpy (t, s);
printf ("%s\n", t);
return 0;
}
q6-1.c
/* code: q6-1.c (v1.20.00) */
#include <stdio.h>
int main () {
float a[5];
int i;
float sum, avg;
a[0] = 30.0;
a[1] = 20.0;
a[2] = 10.0;
a[3] = 25.0;
a[4] = 15.0;
sum = 0.0;
for (i = 0; i < 5; i++)
sum += a[i];
avg = sum / 5.00;
printf ("%f\n", avg);
return 0;
}
q6-2.c
/* code: q6-2.c (v1.20.00) */
#include <stdio.h>
#define TABLE 9
int main () {
int i, j;
int a[TABLE][TABLE];
for (i = 0; i < TABLE; i++) {
for (j = 0; j < TABLE; j++) {
a[i][j] = (i + 1) * (j + 1);
}
}
for (i = 0; i < TABLE; i++) {
for (j = 0; j < TABLE; j++) {
printf ("%02d ", a[i][j]);
}
printf ("\n");
}
return 0;
}
q6-3.c
/* code: q6-3.c (v1.20.00) */
#include <stdio.h>
#include <stdlib.h>
int main () {
int i, j, k;
int array[2][3][4];
for (i = 0; i < 2; i++) {
for (j = 0; j < 3; j++) {
for (k = 0; k < 4; k++) {
array[i][j][k] = (rand () % 100) + 1;
}
}
}
for (i = 0; i < 2; i++) {
for (j = 0; j < 3; j++) {
for (k = 0; k < 4; k++) {
printf ("%03d ", array[i][j][k]);
}
printf ("\n");
}
printf ("\n");
}
return 0;
}
q6-4.c
/* code: q6-4.c (v1.20.00) */
#include <stdio.h>
#include <string.h>
/* ------------------------------------------- */
int main () {
char s0[] = "aaaaa";
char s1[] = "bbbbb";
char s2[] = "aaaaaaa";
int i;
printf ("strncmp(str1, str2, 3)\n");
i = strncmp (s0, s0, 3);
printf ("[%s] [%s] (%d)\n", s0, s0, i);
i = strncmp (s0, s1, 3);
printf ("[%s] [%s] (%d)\n", s0, s1, i);
i = strncmp (s1, s0, 3);
printf ("[%s] [%s] (%d)\n", s1, s0, i);
i = strncmp (s0, s2, 3);
printf ("[%s] [%s] (%d)\n", s0, s2, i);
return 0;
}
q6-5.c
/* code: q6-5.c (v1.20.00) */
#include <stdio.h>
#include <string.h>
int main () {
char s0[] = "abcdefg";
int i;
i = strlen (s0);
printf ("[%s] (%d)\n", s0, i);
return 0;
}
q6-6.c
/* code: q6-6.c (v1.20.00) */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 10
struct student {
int id;
char grade;
char name[128];
};
typedef struct student STUDENT_TYPE;
/* ------------------------------------------- */
int main () {
STUDENT_TYPE db1[MAX];
STUDENT_TYPE *db2[MAX];
int i;
printf ("database1\n");
for (i = 0; i < MAX; i++) {
db1[i].id = 100 + i;
db1[i].grade = 'a' + rand () % 5;
strcpy (db1[i].name, "John Doe");
printf ("%d %c %s\n", db1[i].id, db1[i].grade, db1[i].name);
}
printf ("\n");
printf ("database2\n");
for (i = 0; i < MAX; i++) {
db2[i] = malloc (sizeof (STUDENT_TYPE));
db2[i]->id = 200 + i;
db2[i]->grade = 'a' + rand () % 5;
strcpy (db2[i]->name, "John Doe");
printf ("%d %c %s\t\t", db2[i]->id, db2[i]->grade, db2[i]->name);
printf ("%d %c %s\n", (*db2[i]).id, (*db2[i]).grade, (*db2[i]).name);
}
for (i = 0; i < MAX; i++) {
free (db2[i]);
}
return 0;
}
EOF