Question

One function tries to pass char array to another, but without success:

char * ret() {
    char buf[32];
    buf[0]='1'; // buf char array contains 1
    buf[31]='\0';
    printf(buf);
    return buf;
}

int multiline() {
    char temp[32];
    strcpy(temp,ret()); // temp array doesn't contain 1 after this line
    temp[31]='\0'; 
    printf(temp);
}

Please tell me, how to fix this issue?

Answer 1

You can fix the issue by not returning a local variable (allocate a string or return a pointer to a statically allocated one):

char * ret() {
    char * buf = malloc(32*sizeof(char));
    buf[0]='1'; // buf char array contains 1
    buf[31]='\0';
    printf(buf);
    return buf;
}

int multiline() {
    char temp[32];
    char * returnedString = ret();
    strcpy(temp,returnedString);
    free(returnedString);
    temp[31]='\0'; 
    printf(temp);
}