Program Ape---C language details 17 (the maximum value for time_t, strlen for length, malloc to allocate character memory details, switch in default details)

Main content: The maximum value of the time_t, the strlen is the length, malloc allocation character memory details, switch in the default details

#include <stdio.h> #include <time.h>int main () {    /************************************         time_t max Test     **************** /    time_t biggest = 0x7fffffff;        printf ("biggest =%s", CTime (&biggest)); /* CTime () function converts the parameter to local time, here is a detail, I don't have a newline in printf, but the output is wrapped, and the following test CTime (&biggest) returns a string containing ' \ n ' really */             char *test = CTime (&biggest);    while (*test++)     {         if (*test = = ' \ n ')             printf ("Find ' \\n ' int test\n ");    } //    printf (" biggest =%s \ n ", Asctime (Gmtime (&biggest)));  //Correct statement is this sentence, the above statement has a time difference problem     /************************************************        strlen () function test     *************************** /    char *a = "abc";    printf ("strlen =%d\n", Strlen (a)); //strlen The length of the string, which does not contain the most '     malloc (strlen (a));//This is not true because of the use of malloc (Strlen (a) +1); To apply for '  /*************************************************************** ' memory        **        switch Test          Result Description: Default can be placed anywhere in switch     ******************************************************************/    int b = 2;     const int c = 2; Add Case c:printf ("C") to the switch and you can test that the Const modifier's C is not constant     switch (b)     {        case 0:             printf ("case:0\n");  & nbsp          break;        case 1:              printf ("case:1\n");            break;        default:                              printf ("default\n");            break;        case 2:             printf ("case:2\n");            while (b = = 2)              {                 printf ("B = 1\n");                break;   //break; To jump out of the nearest layer of loops or switch statements, jump out of the loop, and then proceed to the next             }            printf ("after break,the Program Run here!\n ");            break;    }     return 0;}

Output:

Program Ape---C language details 17 (the maximum value for time_t, strlen for length, malloc to allocate character memory details, switch in default details)