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下面这段代码计算某一天是一年中的第几天。switch的第七个case开始报错。删掉case 7 ~ case 12则可以运行。
报错:||=== Build: Debug in project (compiler: GNU GCC Compiler) ===|
D:\myCODE\c\project\main.c||In function 'Days':|
D:\myCODE\c\project\main.c|19|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|19|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c|20|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|20|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c|21|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|21|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c|22|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|22|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c|23|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|23|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c|24|error: lvalue required as increment operand|
D:\myCODE\c\project\main.c|24|error: expected ';' before numeric constant|
D:\myCODE\c\project\main.c||In function 'main':|
D:\myCODE\c\project\main.c|42|error: expected expression before '=' token|
||=== Build failed: 13 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <math.h>
- #include <stdarg.h>
- int Days(int *a, int *b);
- int Days(int *a, int *b){
- unsigned int x = *a;
- int y = *b;
- int days;
- switch(x){
- case 1: days = y;break;
- case 2: days = 31+y;break;
- case 3: days = 31+28+y;break;
- case 4: days = 31+28+31+y;break;
- case 5: days = 31+28+31+30+y;break;
- case 6: days = 31+28+31+30+31+y;break;
- case 7: days = 31+28+31+30++31+30+y;break; [color=Red]//从这里开始会报错[/color]
- case 8: days = 31+28+31+30++31+30+31+y;break;
- case 9: days = 31+28+31+30++31+30+31+31+y;break;
- case 10: days = 31+28+31+30++31+30+31+31+30+y;break;
- case 11: days = 31+28+31+30++31+30+31+31+30+31+y;break;
- case 12: days = 31+28+31+30++31+30+31+31+30+31+30+y;break;
- default: break;
- }
- return days;
- }
- int main(void)
- {
- int year, month, day;
- int DAY;
- printf("please enter year-month-day.eg: 1995-5-3");
- scanf("%d-%d-%d",&year, &month, &day);
- if(year%4 ==0 || year%400 == 0){
- DAY = Days(&month, &day) + 1;
- printf("this is the %d th day of %d", DAY, year);
- }
- else
- printf("this is the %d th day of %d", Days(&month, &day), year);
- return = 0;
- }
复制代码
case 7: days = 31+28+31+30 ++31+30+y;break;
case 8: days = 31+28+31+30 ++31+30+31+y;break;
case 9: days = 31+28+31+30 ++31+30+31+31+y;break;
case 10: days = 31+28+31+30 ++31+30+31+31+30+y;break;
case 11: days = 31+28+31+30 ++31+30+31+31+30+31+y;break;
case 12: days = 31+28+31+30 ++31+30+31+31+30+31+30+y;break;
还有程序最后:
return = 0;
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