小编Chr*_*ris的帖子

我编写了以下代码,目的是在字符串上使用指针算法来查找和替换目标子字符串.显然,它不优雅,但不幸的是它也是不正确的 - 它为字符串添加了无关的字符.

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

int main() {
    char string[] = "The quick brown fox jumped over the lazy dog.";
    char target[] = "brown"
    char replacement[] = "ochre";
    char segment[80+1];
    char pre_segment[80+1];
    char post_segment[80+1];
    int S = strlen(string), T = strlen(target);
    for (int i = 0; i < S; i++) {
        strncpy(segment, string + i, T);
        if (strcmp(segment, target) == 0) {
        >>> strncpy(pre_segment, string, i); <<<
            strncpy(post_segment, string + i + T,
                S - (i + T)); …