Expanding char by some more chars in C ( no overwriting allowed )

Question

I would like to save more chars in ch[500] then it is already there. I dont want to lose the chars I've saved there before.

Something that would work like this:

ch = ch + ’nextch’;

Answer 1

You can use strcat() or strncat() to Concatenate two strings.

for example

char ch[100];
 strcpy(ch,"hello");
 strcat(ch," world");  

if you want to append only one character

    char str[100];
    strcpy(str,"hello");
    char ch='a';

    char buf[2];
    sprintf(buf,"%c",ch); 
    strncat(str,sizeof str, buf);

or

    size_t length= strlen(str);
    str[strlen(str)]=ch;
    str[length+1]='\0';