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[英]copy or assign one string to another string in a 2 dimensional array of pointers
[英]Can I copy string from two dimensional array to one dimensional array (Array&Pointers)
我发现将字符串从二维数组复制到一维数组时遇到了麻烦。 因此,我按地址访问了这些值。 for循环内部运行良好。 是将一维数组真正复制为带有二维数组的值。
char *str[4] = {"i " "California", "ii " "Texas", "iii " "Florida", "iv " "Washington"}; //two dimensional array
int r = 0, c, i = 0;
char *temp; //one dimesional array
for(r = 0; r < 4; r++){
c = 0;
while(*(str[r]+c) != '\0'){
printf("%c", *(str[r]+c));
c++;
temp = &str[r][c];
printf("%c", *temp);
}
printf("\n");
}
return 0;
您可以使用calloc分配临时指针内存大小。
#include<stdio.h>
#include <stdlib.h>
#include<string.h>
int main()
{
char *str[4] = {"i " "California", "ii " "Texas", "iii " "Florida", "iv " "Washington"}; //two dimensional array
int r = 0;
for(r = 0; r < 4; r++)
{
char *temp = (char*) calloc (strlen(str[r]) ,sizeof(char));
strcpy(temp, str[r]);
printf("%s", str[r]);
printf("\n");
free(temp);
}
return 0;
}
假设:
char array2dim[x][y];
然后创建一个一维数组。
char array1dim[x*y];
memcpy( array1dim, array2dim, x*y );
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