屏幕一秒钟，我把双倍getchar() [英] The screen goes in a second and I have put double getchar()

问题描述

嗨 我将双getchar()放在末尾.控制台应用程序屏幕在一毫秒内消失.
为什么?
谢谢您的答复.

Hy I have put double getchar() at the end. The console application screen disappears in a millisecond.
Why?
Thank You for reply.

#include <stdafx.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
char *get_name(void);
int main (void) {
    char *name = NULL;
    name = get_name();
    assert(name != NULL);
    printf ("The entered name was: %s.\n", name);
    free(name);
    name = NULL;
    getchar();
    getchar();
    return 0;
}
char *get_name(void) {
    char *input = (char*)malloc(100);
    if (input == NULL) {
        printf ("Unable to allocate memory!\n");
        return NULL;
    }
    printf ("Enter your name: ");
    scanf ("99%s", input);
    return input;
}

推荐答案

只需删除99

Just remove 99

scanf ("%s", input);

您可能的意思是:

You probably meant:

scanf ("%99s", input);

无论如何，最好始终检查scanf返回值.

In any case you best always check scanf return value.

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