prog.c: In function 'main':
prog.c:10:4: error: expected ';' before 'printf'
printf("%d\n",ch);
^~~~~~
prog.c:11:7: warning: implicit declaration of function 'isalunm' [-Wimplicit-function-declaration]
if(isalunm(ch))
^~~~~~~
prog.c:13:8: warning: implicit declaration of function 'print' [-Wimplicit-function-declaration]
print("%ch\xe5\xad\x97\xe4\xb8\xb2\xe7\x82\xba\xe5\xad\x97\xe6\xaf\x8d\n",ch);
^~~~~
prog.c:14:11: warning: implicit declaration of function 'islower' [-Wimplicit-function-declaration]
if(islower(ch))
^~~~~~~
prog.c:15:46: warning: implicit declaration of function 'toupper' [-Wimplicit-function-declaration]
printf("\xe5\xb0\x87\xe5\xad\x97\xe6\xaf\x8d\xe8\xbd\x89\xe6\x88\x90\xe5\xa4\xa7\xe5\xaf\xab:%ch\n",toupper(ch));
^~~~~~~