从键盘输入两个字符串s1,s2并将s2中的大写字母连接到字符串s1的末尾，并输出连接后的结果用c语言写

#include <stdio.h>
#include <string.h>

int main()
{
char s1[100], s2[100];
int i, j;

printf("Enter string s1: ");
gets(s1);

printf("Enter string s2: ");
gets(s2);

j = strlen(s1); // get the length of s1

// copy uppercase letters from s2 to the end of s1
for (i = 0; s2[i] != '\0'; i++)
{
if (s2[i] >= 'A' && s2[i] <= 'Z')
{
s1[j] = s2[i];
j++;
}
}

s1[j] = '\0'; // add null character to the end of s1

printf("Resulting string: %s", s1);

return 0;
}