第 6 章：陣列與字串處理

#include <stdio.h>
int main()
{
    int Sum=0, Array[4]={1, 2, 3}, i;
    for(i=1; i<4; i++)
        Sum+=Array[i];
    printf("%d", Sum);
    return 0;
}

#include <stdio.h>
int main()
{
    char Str[]="abcde";
    char *ptr=Str;
    printf("%s", ++ptr);
    return 0;
}

const int Count = ? ;
char Dictionary[50] = "IWhLoaorevYTeouTW5aM7iynwyuaTYn?";
char ShowMessage[12] ={0};
char *P = &Dictionary[0];
int Index = 0, Search = 0;
for(Index =0; Index < 11 ; Index++)
{
    ShowMessage[Index] = P[Search];
    Search += Count;
}

int TotalSteps = 5;
int Count = 0;
char StepName[9][4] = { "拖","脫","送","沖","蓋","泡","送" };
int Select[5] = {?};
for (Count = 0; Count < TotalSteps; Count+=1)
{
    std::cout << StepName[Select[Count]];
}

int  Data[10] = {1,2,3,4,11,12,13,15};
int  *pData = &Data[2];

char StepName[5][4] = {"脫","蓋","送","沖","泡"};
void swap(char *a, char *b) {
    char tmp;
    for (x = 0; x < 3; x++) {
        tmp = a[x];
        a[x] = b[x];
        b[x] = tmp;
    }
}
int main(void) {
    /* 行號13~15待填 */
    for (i = 0; i<5 ;i++)
        printf("%s", StepName[i]);
    return 0;
}

char *ptr="Outside";
int main()
{
    char str[20]="This is a book\0";
    char ptr[20]="Main\0";
    *ptr = *str;
    printf("%s", ptr);
    return 0;
}

char str[100] = "This is a book and that is a dog.\0";
char ans = 0, match_count=0;
char query[]="is";
int len = sizeof(query), i , j;
for(i=0; (i<100-len)&&(str[i]!='\0'); i++){
    for(j=0; j<len-1; j++)
        if(query[j]==str[i+j])
            ans++;
        else
            break;
    if(ans==len-1)
        printf("%d-th match str[%d] !\n", ++match_count, i);
    ans=0;
}
printf("%d, %d, %d", len, ans, match_count);

int n[5]={1, 2, 3, 4, 5}, i;
n[1]=100;
*n = 1;
for(i=0; i<5; i++)
    printf("%d", *(n+i));

short i;
unsigned char count = 0, X = 0, Y = 0;
unsigned char x[8]= {1,1,1,1,1,1,1,0};
unsigned char y[8]= {0,1,1,1,1,1,1,1};
for(i = 7; i >= 0; i--){
  if(x[i] != y[i])
    count++;
  X += x[i]*pow(2,7-i); //pow(a,b)傳回a的b次方值
  Y += y[i]*pow(2,7-i);
}

short i;
unsigned char count = 0, X = 0, Y = 0;
unsigned char x[8]= {1,1,1,1,1,1,1,0};
unsigned char y[8]= {0,1,1,1,1,1,1,1};
for(i = 7; i >= 0; i--){
  if(x[i] != y[i])
    count++;
  X += x[i]*pow(2,7-i);
  Y += y[i]*pow(2,7-i);
}
printf("%.3f", (float)count/8);

int  used[6] = {1, 2, 3, 4}, i;
char name[6] = "Alex";
for(i = 1; i < 4; i++){
    used[i] = used[i] + 1;
    name[i] = name[i] + 1;
}

int arr[5] = {10, 20};
int i, sum = 0;
for (i = 0; i < 5; i++)
    sum += arr[i];
printf("%d", sum);

#include <stdio.h>
#include <string.h>
int main(void) {
    char a[] = "hello";
    char b[] = "help";
    if (strcmp(a, b) == 0)
        printf("相同");
    else
        printf("不同，strlen(a)=%zu", strlen(a));
    return 0;
}

char Item[8][4] = {"筆","尺","橡皮擦","剪刀","膠水","釘書機"};
int Order[3] = {2, 4, 0};
for (int i = 0; i < 3; i++)
    printf("%s", Item[Order[i]]);

int data[4] = {7, 14, 21, 28};
int *p = data;
printf("%d %d %d", *(p+2), p[1], *p);

int score[5] = {60, 75};
char grade[5] = "ABCDE";
int i;
for (i = 1; i < 3; i++) {
    score[i] = score[i] + 10;
    grade[i] = grade[i] + 1;
}
printf("score[2]=%d, grade[2]=%c", score[2], grade[2]);