c：c语言数字转化为字符串以及指向三维数组的指针
[root@rockylinux tmp]# cat pointer_array.c
[root@rockylinux tmp]# cat pointer_array.c
/* date: 2022-07-01
*
*
* 知识点：数字转化为字符串：sprintf();
*
*
* 三维数组的指针：*pt_three[second_dimension][third_dimension] = three_dimension_array_name;
* 三维数组的使用： *( *( *( pt_three + first_dimension_offset ) + second_dimension_offset ) + third_dimension_offset )
*
* 三维数组的指针移动：
* 三维数组在第一维度方向的指针移动： *(pt_three + i);
* 三维数组在第二维度方向的指针移动： *(*pt_three + j);
* 三维数组在第三维度方向的指针移动： *(**pt_three + k);
*
*
* */
#include
#include
#include
void msg()
{
int one[5]={1,2,3,4,5};
int two[3][4]={10,11,12,13,20,21,22,23,30,31,32,33};
int three[3][4][5]={0};
// three[3][4][5] initalizes.
printf("\npt_three: testing\n");
for(int i=0; i<3; i++)
{
for(int j=0; j<4; j++)
{
for(int k=0; k<5; k++)
{
// 定义临时变量
char tmp_char[10];
int tmp_int=0;
// 数字转为字符串
sprintf(tmp_char, "%d%d%d",i+1,j+1,k+1);
printf("tmp_char=%s\t", tmp_char);
// 字符转化为数字
tmp_int = atoi(tmp_char);
printf("tmp_int=%d\t", tmp_int);
// 数字给数组赋值
three[i][j][k]=tmp_int;
// 数据调试
printf("three[%d][%d][%d]=%d\n", i,j,k, three[i][j][k]);
// 输出换行控制符
if(3==4){printf("\n");}
}
}
}
printf("\n");
int *ptone = one;
int (*pttwo)[4] = two;
int (*ptthree)[4][5]=three;
printf("\npointer_one: display\n");
for(int i=0; i<5; i++)
{
printf("pt_one[%d]=%d\t",i, *(ptone+i));
if(4==i)printf("\n");
}
printf("\n");
printf("\npointer_two: display\n");
for(int i=0; i<3; i++)
{
for(int j=0; j<4; j++)
{
printf("pt_two[%d][%d]=%d\t", i, j, *(*(pttwo+i)+j) );
if(3==j) printf("\n");
}
}
printf("\n");
printf("\npt_three: display\n");
for(int i=0; i<3;i++)
{
for(int j=0; j<4; j++)
{
for(int k=0; k<5; k++)
{
printf("pt_three[%d][%d][%d]=%d\t", i,j,k, *(*(*(ptthree+i)+j)+k));
if(4==k) printf("\n");
}
}
}
printf("\n\n");
// 三维数组第三维度方向的指针移动
ptthree = three;
printf("three_dimensions: three_dimensions_third_dimension_movement\n");
printf("pt_array[2][0][0]=%d\n", *( **(ptthree+2)+0) );
printf("pt_array[2][0][1]=%d\n", *( **(ptthree+2)+1) );
printf("pt_array[2][0][2]=%d\n", *( **(ptthree+2)+2) );
printf("pt_array[2][0][3]=%d\n", *( **(ptthree+2)+3) );
printf("pt_array[2][0][4]=%d\n\n\n", *( **(ptthree+2)+4) );
}
int main(int argc, char *argv[])
{
msg();
return 0;
}
[root@rockylinux tmp]#
[root@rockylinux tmp]#
[root@rockylinux tmp]# ./pointer_array
pt_three: testing
tmp_char=111 tmp_int=111 three[0][0][0]=111
tmp_char=112 tmp_int=112 three[0][0][1]=112
tmp_char=113 tmp_int=113 three[0][0][2]=113
tmp_char=114 tmp_int=114 three[0][0][3]=114
tmp_char=115 tmp_int=115 three[0][0][4]=115
tmp_char=121 tmp_int=121 three[0][1][0]=121
tmp_char=122 tmp_int=122 three[0][1][1]=122
tmp_char=123 tmp_int=123 three[0][1][2]=123
tmp_char=124 tmp_int=124 three[0][1][3]=124
tmp_char=125 tmp_int=125 three[0][1][4]=125
tmp_char=131 tmp_int=131 three[0][2][0]=131
tmp_char=132 tmp_int=132 three[0][2][1]=132
tmp_char=133 tmp_int=133 three[0][2][2]=133
tmp_char=134 tmp_int=134 three[0][2][3]=134
tmp_char=135 tmp_int=135 three[0][2][4]=135
tmp_char=141 tmp_int=141 three[0][3][0]=141
tmp_char=142 tmp_int=142 three[0][3][1]=142
tmp_char=143 tmp_int=143 three[0][3][2]=143
tmp_char=144 tmp_int=144 three[0][3][3]=144
tmp_char=145 tmp_int=145 three[0][3][4]=145
tmp_char=211 tmp_int=211 three[1][0][0]=211
tmp_char=212 tmp_int=212 three[1][0][1]=212
tmp_char=213 tmp_int=213 three[1][0][2]=213
tmp_char=214 tmp_int=214 three[1][0][3]=214
tmp_char=215 tmp_int=215 three[1][0][4]=215
tmp_char=221 tmp_int=221 three[1][1][0]=221
tmp_char=222 tmp_int=222 three[1][1][1]=222
tmp_char=223 tmp_int=223 three[1][1][2]=223
tmp_char=224 tmp_int=224 three[1][1][3]=224
tmp_char=225 tmp_int=225 three[1][1][4]=225
tmp_char=231 tmp_int=231 three[1][2][0]=231
tmp_char=232 tmp_int=232 three[1][2][1]=232
tmp_char=233 tmp_int=233 three[1][2][2]=233
tmp_char=234 tmp_int=234 three[1][2][3]=234
tmp_char=235 tmp_int=235 three[1][2][4]=235
tmp_char=241 tmp_int=241 three[1][3][0]=241
tmp_char=242 tmp_int=242 three[1][3][1]=242
tmp_char=243 tmp_int=243 three[1][3][2]=243
tmp_char=244 tmp_int=244 three[1][3][3]=244
tmp_char=245 tmp_int=245 three[1][3][4]=245
tmp_char=311 tmp_int=311 three[2][0][0]=311
tmp_char=312 tmp_int=312 three[2][0][1]=312
tmp_char=313 tmp_int=313 three[2][0][2]=313
tmp_char=314 tmp_int=314 three[2][0][3]=314
tmp_char=315 tmp_int=315 three[2][0][4]=315
tmp_char=321 tmp_int=321 three[2][1][0]=321
tmp_char=322 tmp_int=322 three[2][1][1]=322
tmp_char=323 tmp_int=323 three[2][1][2]=323
tmp_char=324 tmp_int=324 three[2][1][3]=324
tmp_char=325 tmp_int=325 three[2][1][4]=325
tmp_char=331 tmp_int=331 three[2][2][0]=331
tmp_char=332 tmp_int=332 three[2][2][1]=332
tmp_char=333 tmp_int=333 three[2][2][2]=333
tmp_char=334 tmp_int=334 three[2][2][3]=334
tmp_char=335 tmp_int=335 three[2][2][4]=335
tmp_char=341 tmp_int=341 three[2][3][0]=341
tmp_char=342 tmp_int=342 three[2][3][1]=342
tmp_char=343 tmp_int=343 three[2][3][2]=343
tmp_char=344 tmp_int=344 three[2][3][3]=344
tmp_char=345 tmp_int=345 three[2][3][4]=345
pointer_one: display
pt_one[0]=1 pt_one[1]=2 pt_one[2]=3 pt_one[3]=4 pt_one[4]=5
pointer_two: display
pt_two[0][0]=10 pt_two[0][1]=11 pt_two[0][2]=12 pt_two[0][3]=13
pt_two[1][0]=20 pt_two[1][1]=21 pt_two[1][2]=22 pt_two[1][3]=23
pt_two[2][0]=30 pt_two[2][1]=31 pt_two[2][2]=32 pt_two[2][3]=33
pt_three: display
pt_three[0][0][0]=111 pt_three[0][0][1]=112 pt_three[0][0][2]=113 pt_three[0][0][3]=114 pt_three[0][0][4]=115
pt_three[0][1][0]=121 pt_three[0][1][1]=122 pt_three[0][1][2]=123 pt_three[0][1][3]=124 pt_three[0][1][4]=125
pt_three[0][2][0]=131 pt_three[0][2][1]=132 pt_three[0][2][2]=133 pt_three[0][2][3]=134 pt_three[0][2][4]=135
pt_three[0][3][0]=141 pt_three[0][3][1]=142 pt_three[0][3][2]=143 pt_three[0][3][3]=144 pt_three[0][3][4]=145
pt_three[1][0][0]=211 pt_three[1][0][1]=212 pt_three[1][0][2]=213 pt_three[1][0][3]=214 pt_three[1][0][4]=215
pt_three[1][1][0]=221 pt_three[1][1][1]=222 pt_three[1][1][2]=223 pt_three[1][1][3]=224 pt_three[1][1][4]=225
pt_three[1][2][0]=231 pt_three[1][2][1]=232 pt_three[1][2][2]=233 pt_three[1][2][3]=234 pt_three[1][2][4]=235
pt_three[1][3][0]=241 pt_three[1][3][1]=242 pt_three[1][3][2]=243 pt_three[1][3][3]=244 pt_three[1][3][4]=245
pt_three[2][0][0]=311 pt_three[2][0][1]=312 pt_three[2][0][2]=313 pt_three[2][0][3]=314 pt_three[2][0][4]=315
pt_three[2][1][0]=321 pt_three[2][1][1]=322 pt_three[2][1][2]=323 pt_three[2][1][3]=324 pt_three[2][1][4]=325
pt_three[2][2][0]=331 pt_three[2][2][1]=332 pt_three[2][2][2]=333 pt_three[2][2][3]=334 pt_three[2][2][4]=335
pt_three[2][3][0]=341 pt_three[2][3][1]=342 pt_three[2][3][2]=343 pt_three[2][3][3]=344 pt_three[2][3][4]=345
three_dimensions: three_dimensions_third_dimension_movement
pt_array[2][0][0]=311
pt_array[2][0][1]=312
pt_array[2][0][2]=313
pt_array[2][0][3]=314
pt_array[2][0][4]=315
[root@rockylinux tmp]#
[root@rockylinux tmp]#
[root@rockylinux tmp]#