Napoleon1130的博客

常用小方法随记 1 变量自增和自减可以放在循环条件里面，如： shoe = 3.0; while (shoe < 18.5) { foot = SCALE * size + ADJUST; printf("%10.1f %20.2f inches\n", shoe, foot); ++shoe; } 可以改为 shoe = 2.0; while (++shoe < 18.5)/*把自增放在了循环条件里面 { foot = SCALE*shoe + ADJUST; printf("%10.1f

清空scanf缓冲区 昨天用C编程，遇到一个关于scanf的细节问题，假如运行如下程序： #include<stdio.h> int main() { char ch1,ch2; printf(“Input for ch1:/n”); scanf("%c",&ch1); printf(“ch1=%c/n”,ch1); printf(“Input for ch2:/n”); scanf("%c",&ch2); printf(“ch2=%c/n”,ch2); } 表面上看这段程序是没