prog.c: In function ‘main’:
prog.c:6:9: warning: left-hand operand of comma expression has no effect [-Wunused-value]
if(a>=1,a<=100;){
^
prog.c:6:16: error: expected ‘)’ before ‘;’ token
if(a>=1,a<=100;){
^
prog.c:7:12: warning: format ‘%d’ expects a matching ‘int’ argument [-Wformat=]
printf("%d는 참입니다.");
^