I have 2 variables: char x[100] and char c;
At first, I needed to store c within x . I did this:
x[0] = c;
Within my program, after the one previously executed, the c variable changes value. So I need to concatenate the value of c next to x that has already been filled. I tried to do this:
x[strlen(x +1)] = c;
But it did not work.
Using StrCat does not solve.
Your problem is here strlen(x +1) , the correct one would be strlen(x) + 1 .
Getting
x[strlen(x)+1] = c;
Depending on your code you do not even need to add 1, eg
#include <stdio.h>
#include <string.h>
#define TAMANHO 100
int main()
{
char x[TAMANHO];
memset(&x, 'x[strlen(x)+1] = c;
', sizeof(char)*TAMANHO);
char c = 'a';
x[strlen(x)] = c; // strlen(x) retorna 0 porque está vazio
c = 'b';
x[strlen(x)] = c; // strlen(x) retorna 1 porque já possui 1 elemento
printf("%s", x);
return 0;
}
ab