我是一名学生,开始学习一些以前的C知识的C ++。我有一个用C风格编写的工作C ++代码,它有一个oveloaded函数,用于输入double
或string
:
#include "stdio.h"
#include "string.h"
#include "ctype.h"
const int STR_LEN = 7;
int try_to_input(double* real_number);
int try_to_input(char (*string)[STR_LEN]);//line 16
int main()
{
return 0;
}
int try_to_input(double* real_number) {//line 35
int attempts_for_input = 3;
//stops when == 0
while (attempts_for_input) {
//if input unsuccessful
if (scanf_s("%lf", real_number) == 0) {
puts("Invalid input! Try again.");
attempts_for_input--;
//flush stdin
int tmp;
while ((tmp = getchar()) != EOF && tmp != '\n');
//extra '\n' after that for some reason
}
else return 0;
}
return -1;
}
int try_to_input(char (*string) [STR_LEN] ) { //line 53
int attempts_for_input = 3;
while (attempts_for_input) {
if (gets_s(*string, STR_LEN) == NULL) {
puts("Invalid input! Try again.\n");
attempts_for_input--;
//flush stdin
int tmp;
while ((tmp = getchar()) != EOF && tmp != '\n');
}
else return 0;
}
return -1;
}
但是当我把它编译为C时,它会给我以下错误:
(16): warning C4028: formal parameter 1 different from declaration (35): warning C4028: formal parameter 1 different from declaration (53): error C2084: function 'int try_to_input(double *)' already has a body (35): note: see previous definition of 'try_to_input'
<小时/> 可能是什么问题呢?我的超载有什么问题?
答案 0 :(得分:3)
答案 1 :(得分:0)
正如Jonathon Reinhart评论的那样,C语言根本不支持重载函数。