strcat()函数用于拼接字符串。

示例

//Visual Studio中加上这句才可以使用scanf()
//否则只能使用scanf_s()
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdbool.h>
//strcat()函数的原型在string.h
#include <string.h>

#define SIZE 80

char * s_gets(char * st, int n);

//argc: 参数个数 argv[]: 参数数组
int main(int argc, char *argv[])
{
	char flower[SIZE];
	char addon[] = "s smell like old shoes.";
	puts("What is your favorite flower?");
	if (s_gets(flower, SIZE))
	{
		//将addon连接到flower后面
		strcat(flower, addon);
		puts(flower);
		puts(addon);
	}
	else
		puts("End of file encountered!");
	puts("bye");

	system("pause");
	return 0;
}

// 自己实现读取函数
char * s_gets(char * st, int n)
{
	char * ret_val;
	int i = 0;
	ret_val = fgets(st, n, stdin);
	if (ret_val) //即，ret_val != NULL
	{
		while (st[i] != '\n' && st[i] != '\0')
			i++;
		if (st[i] == '\n')
			st[i] = '\0';
		else
			while (getchar() != '\n')
				continue;
	}
	return ret_val;
}

运行测试