Question

#include<stdio.h>
int main()
{
 unsigned char a[3];
 unsigned char b[3];
 int *l[3]=NULL;
 int i = 0;

 a[0]=0;
 a[1]=1;
 a[2]=2;
 b[0]=3;
 b[1]=4;
 b[2]=5;

 l[0]=&a;
 l[1]=&b;
 if(strcmp(l[0],l[1])==0) {
   printf("Compared not same");
 }
 return 0;
}

我想将数组存储在数组“l”中。并且要比较存储在索引0和索引1处的数组。我收到了错误。请帮忙。

Answer 1

#include<stdio.h>
int main()
{
 unsigned char a[3];
 unsigned char b[3];
 unsigned char *l[2];

 a[0] = 0; a[1] = 1; a[2] = 2;
 b[0] = 3; b[1] = 4; b[2] = 5;

 l[0] = a; l[1] = b;
 if(strncmp(l[0], l[1], 3) != 0) {
   printf("Compared not same");
 }
 return 0;
}

Answer 2

#include<stdio.h>
int main()
{
  unsigned char a[3];
  unsigned char b[3];
  unsigned char *l[2];

  a[0] = '3'; a[1] = '4'; a[2] = '\0';
  b[0] = '3'; b[1] = '4'; b[2] = '\0';

  l[0] = a; l[1] = b;
  if(strcmp(l[0], l[1]) != 0) {
    printf("Compared not same");
  } else {
    printf("Compared same");
  }
  return 0;
}

Answer 3

int main()
{
    char a[3] = {1, 1, 2};
    char b[3] = {1, 4, 5};
    char *l[2]= {a, b};

    printf( (strncmp(l[0], l[1], 3)==0) ? "Compared are equal" : "Compared are not equal");

 return 0;
}

请注意，0是行的结尾，因此chars [0,1,2]和[0,5,5]的数组相等。此外，如果您在此类数组中没有0，则可能会导致错误，因为它将是无限数组，并将尝试从内存中获取不适用于此数组的值。你真的应该从任何关于该语言基础知识的好的c / c ++书开始。

Answer 4

不确定在数组中存储数组，但您应该使用memcmp代替strcmp来比较数组（因为strcmp比较字符串，而您的数组不是字符串。）

 unsigned char a[3];
 unsigned char b[3];
 unsigned char *l[2]; // note: corrected a few errors in this line
 int i = 0;

 a[0]=0;
 a[1]=1;
 a[2]=2;
 b[0]=3;
 b[1]=4;
 b[2]=5;

 l[0]=a;
 l[1]=b;
 if(memcmp(l[0],l[1], sizeof(a))==0) { // note: have to specify the length
   printf("Compared same"); // note: reveresed the logic
 }

如何在数组中存储数组并进行比较

4 个答案: