关于 c:String 比较差异(适用于某些情况，有时不适用)

String Comparison Discrepancy (Works for some cases and sometimes doesn't)

我使用以下代码测试了我收到的电子邮件文件中的一些文本检测。

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#include <stdio.h>

int main()
{
int max_size = 100;
char email[100] ="aheanstring4strinstringzil.comg";
int pointer = 0;
int i = 1;
int j = 0;
int len = 0;
int chk = 0;
char found1[7] ="string1";
char found2[7] ="string2";
char found3[7] ="string3";
char found4[7] ="string4";
char found5[7] ="string5";

char user1[7] ="string1"; // 23
char user2[7] ="string2";// 19
char user3[7] ="string3"; // 14
char user4[7] ="string4"; // 16
char user5[7] ="string5";; // 15

while (pointer != max_size && chk != 1)
{

for (j = 0;j<7; j++)
{
found1[j] = *(email+pointer+j);
}

if (strcmp(found1, user1) == 0){
printf("Authorized User Found\
");
chk = 1;
continue;
}

for (j = 0;j<7; j++)
{
found2[j] = *(email+pointer+j);
}

if (strcmp(found2, user2) == 0){
printf("Authorized User Found\
");
chk = 1;
continue;
}

for (j = 0;j<7; j++)
{
found3[j] = *(email+pointer+j);
}

if (strcmp(found3, user3) == 0){
printf("Authorized User Found\
");
chk = 1;
continue;
}

for (j = 0;j<7; j++)
{
found4[j] = *(email+pointer+j);
}

if (strcmp(found4, user4) == 0){
printf("Authorized User Found\
");
chk = 1;
continue;
}

for (j = 0;j<7; j++)
{
found5[j] = *(email+pointer+j);
}

if (strcmp(found5, user5) == 0){
printf("Authorized User Found\
");
chk = 1;
continue;
}

pointer++;

}
printf("Check is %d, Pointer is %d\
",chk, pointer);
return 0;
}

我使用上述代码在电子邮件正文中查找特定用户。如果找到用户，while 循环将中断。当我尝试运行它时，我在上面的变量 (email)

中包含了不同的字符串

我首先尝试在不同的在线 C 编译器上运行它。他们都有字符串 1,3 和 5 工作正常。 (被检测到)

其中一些字符串 2 工作正常(被检测到)。

然而，他们都分享了 string2 从未被检测到的事实。我不知道为什么。我试着想一个原因，但不知道为什么。

非常感谢您的帮助。