prog.c: In function ‘main’:
prog.c:7:1: error: expected ‘,’ or ‘;’ before ‘for’
for (i = 0; i < strlen (msg); i++)
^~~
prog.c:7:15: warning: statement with no effect [-Wunused-value]
for (i = 0; i < strlen (msg); i++)
~~^~~~~~~~~~~~~~
prog.c:7:34: error: expected ‘;’ before ‘)’ token
for (i = 0; i < strlen (msg); i++)
^
prog.c:7:34: error: expected statement before ‘)’ token