C语言入门经典 例题7.14
/* Program 7.14 Sorting strings */
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#define BUFFER_LEN 100 /* Length of input buffer */
#define NUM_P 100 /* maximum number of strings */


int main(void)
{
char buffer[BUFFER_LEN]; /* space to store an input string */
char *pS[NUM_P] = { NULL }; /* Array of string pointers */
char *pTemp = NULL; /* Temporary pointer */
int i = 0; /* Loop counter */
bool sorted = false; /* Indicated when strings are sorted */
int last_string = 0; /* Index of last string entered */


printf("\nEnter successive lines, pressing Enter at the"
" end of each line.\nJust press Enter to end.\n\n");
while((*fgets(buffer, BUFFER_LEN, stdin) != '\n') && (i < NUM_P))
{
pS[i] = (char*)malloc(strlen(buffer) + 1);
if(pS[i]==NULL) /* Check for no memory allocated */
{
printf(" Memory allocation failed. Program terminated.\n");
return 1;
}
strcpy(pS[i++], buffer);
}
last_string = i; /* Save last string index */


/* Sort the strings in ascending order */
while(!sorted)
{
sorted = true;
for(i = 0 ; i<last_string-1 ; i++)
if(strcmp(pS[i], pS[i + 1]) > 0)
{
sorted = false; /* We were out of order */
pTemp= pS[i]; /* Swap pointers pS[i] */
pS[i] = pS[i + 1]; /* and */
pS[i + 1] = pTemp; /* pS[i + 1] */
}
}


/* Displayed the sorted strings */
printf("\nYour input sorted in order is:\n\n");
for(i = 0 ; i<last_string ; i++)
{
printf("%s\n", pS[i] );
free( pS[i] );
pS[i] = NULL;
}
return 0;
}
代码如上，编译后按照错误提示修改函数strcpy(pS[i++], buffer)为strcpy_s(pS[i++],BUFFER_LEN, buffer);，编译通过，然后运行，只要输入超过两行句子程序就崩溃了，这是什么原因啊！

vs2013中正常生成 运行正常

是不是你的程序源文件的后缀名有问题

用.c不要用.cpp

while(!sorted)
{
sorted = true;
for(i = 0 ; i<last_string-1 ; i++)
if(strcmp(pS[i], pS[i + 1]) > 0)
{
sorted = false; /* We were out of order */
pTemp= pS[i]; /* Swap pointers pS[i] */
pS[i] = pS[i + 1]; /* and */
pS[i + 1] = pTemp; /* pS[i + 1] */
}
}

for循环加（）试试

在代码第一行加#define _CRT_SECURE_NO_WARNINGS忽视代码安全问题，代码中仍然使用strcpy就可以了

在代码第一行加#define _CRT_SECURE_NO_WARNINGS忽视这个问题，代码中仍然使用strcpy就可以了