编程练习题

输入一个字符串，将下标为奇数的小写字母转换为大写字母

#include <stdio.h>#include <string.h>#define MAX_SIZE 1024char *func(char *str){int i;//int len = strlen(str);for(i = 0; str[i] != '\0'; i++){        if(i%2 != 0 && str[i] > 'a' && str[i] < 'z'){str[i] = str[i] - 32;}}return str;}int main(){    char str[MAX_SIZE];char *ret;printf("please enter a str:\n");scanf("%s",str);ret = func(str);printf("the result is:%s\n",ret);    return 0;}