/in/ex4.c: In function 'main':
/in/ex4.c:11:13: warning: format '%c' expects argument of type 'char *', but argument 2 has type 'time_t * {aka long int *}' [-Wformat=]
     scanf("%c", &time_T);
             ^
/in/ex4.c:16:5: warning: 'tmTime' is used uninitialized in this function [-Wuninitialized]
     strftime(strTime, sizeof(strTime), format, tmTime);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~