通过网上的一些例子,一些小总结:
break用法:
#includeint main(void){ int ch; for(ch = 0; ch < 6; ch++) { if(ch == 3) { printf("break\n"); break; printf("I love you\n"); } printf("now ch = %d\n",ch); } printf("test over!!\n"); return 0;}
总结:如果遇到break,程序就会终止并推出,所以后面的‘我爱你’也不会打印,因为now ch = %d也是属于循环里的,所以也不会打印出now ch = 3.
二,嵌套循环(break)
#includeint main(void){ int ch, n; for(ch = 0; ch < 6; ch++) { printf("start...\n"); for(n = 0; n < 6;n++) { if(n == 3) { printf("break\n"); break; printf("helloworld\n"); } printf("now n = %d\n",n); } if(ch == 3) { printf("break\n"); break; printf("haha\n"); } printf("now ch = %d\n",ch); } printf("test over\n"); return 0;}
总结:break只会影响到最靠近他的循环,最外层的循环不会干预,每次里边的循环结束后,再跳到外层循环。对于'helloworld','haha'在程序中根本没其作用,也不会打印'now ch = 3' 和'now n = 3'.
continue用法:
#includeint main(void){ int ch; for(ch = 0;ch < 6;ch++) { printf("start...\n"); if(ch == 3) { printf("continue\n"); continue; printf("helloworld\n"); } printf("now ch = %d\n",ch); } printf("test over\n"); return 0;}
总结:continue没有break那样无情,只是终止当前这一步的循环,只要是包括在这个循环里的,后面的都终止,(break其实也是这样).然后跳过这一步继续循环.
循环嵌套(continue):
#includeint main(void){ int ch, n; for(ch = 0;ch <6;ch++) { printf("start...\n"); for(n = 0;n <6;n++) { if(n == 3) { printf("continue\n"); continue; printf("helloworld\n"); } printf("now n = %d\n",n); } if(ch == 3) { printf("continue\n"); continue; printf("haha\n"); } printf("now ch = %d\n",ch); } printf("test over!!\n"); return 0; } 总结:他也是只会影响到最里边的那一层。其他同上!