WY c语言入门(2)
#include <stdio.h> int main() { int price = 0; int bill = 0; printf("请输入金额"); scanf("%d", price); printf("请输入票面"); scanf("%d", bill); printf("应找零%d元", bill - price); return 0; }
2.1.1做判断
#include <stdio.h> int main() { int hour1, minute1; int hour2, minute2; scanf("%d %d", &hour1, &minute1); scanf("%d %d", &hour2, &minute2); int ih = hour1 - hour2; int im = minute1 - minute2; if( im <0 ){ im = 60 + im; ih --; } printf("时间差是%d小时%d分\n", ih, im); return 0; }
2.1.2 条件判断
== 相等 !=不相等 >=大于等于
关系运算结果只有0和1
优先级:赋值>关系运算符>算术运算
2.2.1 找零计算、
1 #include <stdio.h> 2 3 int main() 4 { 5 int price = 0; 6 int bill = 0; 7 8 printf("请输入金额"); 9 scanf("%d", &price); 10 11 printf("请输入票面"); 12 scanf("%d", &bill); 13 14 if( bill >= price){ 15 16 printf("应该找您%d\n", bill - price); 17 18 }
//否则的话
else {
printf(“xxxxxx”)
}
19 return 0; 20 }
2.2.4 嵌套的if-else