C语言实验——大小写转换 (sdut oj)

C语言实验——大小写转换

Problem Description

Input

Output

Example Input

ABCD123efgh

Example Output

abcd123EFGH

Hint

Author

参考代码

#include<stdio.h>
#include<string.h>
int main()
{
char a[100];
char b[100];
gets(a);
int n = strlen(a);
int i;
for(i = 0; i < n; i++)
{
if(a[i] >= 'a' && a[i] <= 'z')
{
b[i] = a[i] - 32;
}
else if(a[i] >= 'A' && a[i] <= 'Z')
{
b[i] = a[i] + 32;
}
else
{
b[i] = a[i];
}
}
for(i = 0; i < n; i++)
{
printf("%c",b[i]);
}
printf("\n");
return 0;
}