void main() { int x=0,a=0,b=0; if(x=a+b) printf(" * * * *\n" ); else printf(" # # # #\n" ); }

void main() { int x=0,a=0,b=0; if(x=a+b) printf(" * * * *\n" ); else printf(" # # # #\n" ); }
void main() { int x=0,a=0,b=0; if(x=a+b) printf(" * * * *\n" ); else printf(" # # # #\n" ); }

void main() { int x=0,a=0,b=0; if(x=a+b) printf(" * * * *\n" ); else printf(" # # # #\n" ); }
if(x=a+b) //x=a+b是赋值语句,这个赋值表达式有值为0,表示假,执行else后面的语句.
printf(" * * * *\n" ); //这个不执行.
else
printf(" # # # #\n" ); //这个执行.