在不同的情況下，我有一個單詞 exit 的所有排列的陣列，有些時候它有效，有些時候它不起作用。我錯過了什么？
// Define all possible case permutations of exit
char *exitStrings[16] = {
"exit",
"exiT",
"exIt",
"eXit",
"exIT",
"eXiT",
"eXIt",
"eXIT",
"EXIT",
"Exit",
"EXit",
"ExIt",
"ExiT",
"EXiT",
"EXIt",
"ExIT"};
// read the message from client and copy it in buffer
read(sockfd, buff, sizeof(buff));
// if read message is one of the permuations of exit strings
// exit client
for (int i = 0; i < sizeof(*exitStrings); i )
{
if (strncmp(buff, exitStrings[i], 4) == 0)
{
printf("Client Exit and the Connection is still open\n");
printf("Listening for new client...\n");
}
}
蒂亞
uj5u.com熱心網友回復：
您可以將輸入轉換為小寫，然后將其與 "exit" 進行比較：
#include <ctype.h>
for(int i = 0; buff[i]; i )
{
buff[i] = tolower(buff[i]);
}
if (strncmp(buff, "exit", 5) == 0)
{
printf("Client Exit and the Connection is still open\n");
printf("Listening for new client...\n");
}
uj5u.com熱心網友回復：
似乎我的原始代碼沒有我最初計算的 16 個案例中的 1 個，我想出了如何在不區分大小寫的情況下進行比較。感謝您所有的幫助
#include <ctype.h>
// read the message from client and copy it in buffer
read(sockfd, buff, sizeof(buff));
if(strncasecmp(buff, "exit",4)==0)
{
printf("Client Exit and the Connection is still open\n");
printf("Listening for new client...\n");
}
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標籤：C
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