C里如何用substring从后往前截取一段字符串?比如char str[] = "纬度:123°12'12''经度:124°25'35'' ";我想截取经度:后面的位置信息。
# include "stdafx.h"
#include <stdio.h>
#include<string.h>
void substring(char *s, char ch1, char ch2, char *substr)
{
while (*s && *s++ != ch1);
while (*s && *s != ch2) *substr++ = *s++;
*substr = '\0';
}
int main()
{
char str[] = "纬度:123°12'12''经度:124°25'35'' ";
char sub1[20];
char sub2[20];
//string str1 = "yesterday once more";
substring(str, ':', '经', sub1);
//substring(str, ':', ,sub2);
printf("%d\n", strlen(sub1));
sub1[strlen(sub1)-1] = '\0';
printf("substring=%s\n", sub1);
printf("%d\n", strlen(sub1));
/*sub2[strlen(sub2) - 1] = '\0';
printf("substring=%s\n", sub2);*/
return 0;
}