how to assign value in two -dimensional array?

[zcrself]

Now , there is a two-dimensional array a[3][4];

how to assign value by one element? for example

     a[1][2] = 'a'; //let the third element of the second line is equal to 'a'

[zacs7]

Now , there is a two-dimensional array a[3][4];

how to assign value by one element? for example

     a[1][2] = 'a'; //let the third element of the second line is equal to 'a'

Erm... you answered your own question.

[zcrself]

directly assign value is not right !

[BEN10]

directly assign value is not right !

Why?
zac7 is right, you've answered your question.

[Adak]

The assignment syntax you showed was correct.

If things aren't working, then we need to see the rest of the program to see what's gone wrong.

[zcrself]

char snp[785][106];
    //getintomemo(argv[1],snp[785][106]);
copyintoarray(p,snp[785][106]);

//COPYINTOARRAY: copy what the pointer points into one array
void copyintoarray(char **p,char arr[785][106])
{
     int m,n;
     for ( int i = 0; i < m ; i++ && p++ )
     {
         
         for ( int j = 0; j < n ; j++ && *p++ )
         {
             char a = **p;
             printf("%c",a);             
         }
         puts("\n");       
     }
}

error is as follows:
invalid conversion from `char' to `char (*)[106]'

[Adak]

I'm not familiar with that type of for loop. I have serious reservations about i++ && p++, and also j++ && *p++. If you want both i and p to increment, the C syntax would be:

for(i = 0; i < yourVariable; i++, p++)  {
  //rest of your loop code
}

Would that be what you wanted?

The compiler is saying that you're trying to treat a char, like a pointer to char, and it can't do that.

Post up your whole program - every error occurs within a context of the whole program. I'm not a good enough programmer to tell you what's wrong with code, unless I have seen that type of code, frequently.

In a whole program however, the problems can't hide nearly as well.

[zcrself]

Your answer is my want , thanks very much !

I'm not familiar with that type of for loop. I have serious reservations about i++ && p++, and also j++ && *p++. If you want both i and p to increment, the C syntax would be:

for(i = 0; i < yourVariable; i++, p++)  {
  //rest of your loop code
}

Would that be what you wanted?

The compiler is saying that you're trying to treat a char, like a pointer to char, and it can't do that.

Post up your whole program - every error occurs within a context of the whole program. I'm not a good enough programmer to tell you what's wrong with code, unless I have seen that type of code, frequently.

In a whole program however, the problems can't hide nearly as well.