oj_demo1/168 规范化名字.c

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

// A-Z 65 90
// a-z 97 122
void upper(char *c) {
    if (*c >= 97 && *c <= 122) {
        *c -= 32;
    }
}

void lower(char *c) {
    if (*c >= 65 && *c <= 90) {
        *c += 32;
    }
}

// 交换字符串
void swap_str(char *a, char *b) {
    char tmp[255] = {0};
    strcpy(tmp, a);
    strcpy(a, b);
    strcpy(b, tmp);
}

//排序
void ordered(int n, char **l) {
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (strcmp(l[i], l[j]) > 0)swap_str(l[i], l[j]);
        }
    }
}

int main() {
    int n, k;
    scanf("%d", &n);
    char **s;
    s = (char **) malloc(n * sizeof(char *));
    for (int i = 0; i < n; ++i) {
        s[i] = (char *) malloc(255 * sizeof(char));
        scanf("%s", s[i]);
        k = 0;
        upper(&s[i][0]);
        while (s[i][k])lower(&s[i][++k]);

    }

    ordered(n, s);

    for (int i = 0; i < n; ++i) {
        printf("%s\n", s[i]);
    }
    for (int i = 0; i < n; ++i) {
        free(s[i]);
    }
    free(s);
}