专业课笔记1月9日
scanf(“%f%f”,&a,&b);输入的三种格式为：11空格22 11回车22 11tab22
执行语句int a=1,b=2,c=3;if(a=c) b++;else b–;后，变量b的值为( A )【2022年真题】A.3 B.2 C.1 D.不确定解析：if(a=c)只是赋值，不用比较大小。本题是将c的值赋值给a，if执行完毕不执行else(固定语法！)
double型变量在输入时只能用%lf 输出时可以使用%lf或者%f
switch(整型/字符型)
判断初始化字符(串)数组语句的对错
放没放多
数组名不能放等号=左边
有没有{ } “ “可以没有{} ‘ ‘必须加{}1234char str[5]="hello"; × 放多了char str[]={'h','b'}; √char str[5]={"hi" ...
Hello World
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