在c中重新分配2d字符数组

Question

我有一个重新分配数组的问题。我想将输入保存到字符串数组中，并对每个新条目进行realloc。下面是我的函数:

char** history=0;
int historycounter=0;
void saveHistory(char* input){
    history=(char**)realloc(history,sizeof(*history)+sizeof(input)*sizeof(char));
    history[historycounter]=(char*)malloc(sizeof(input)*sizeof(char));
    strcpy(history[historycounter],input);
    historycounter++;
}

Answer 1

try this

void saveHistory(const char *input){
    size_t size = strlen(input)+1;
    history = realloc(history, sizeof(*history)*(historycounter+1));
    history[historycounter] = malloc(size);
    memcpy(history[historycounter], input, size);
    historycounter++;
}