使用c从主字符串中删除子字符串

char* removeSubstring(const char* mainStr, const char* subStr);

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

char* removeSubstring(const char* mainStr, const char* subStr) {
    char* result = (char*)malloc(strlen(mainStr) + 1);  // 分配足够的内存来存储结果字符串
    char* current = result;  // 当前位置指针
    const char* remaining = mainStr;  // 剩余的字符串指针

    while (1) {
        const char* found = strstr(remaining, subStr);  // 查找子字符串在主字符串中的位置

        if (found == NULL) {
            strcpy(current, remaining);  // 将剩余的字符串复制到结果字符串中
            break;
        }

        // 复制子字符串之前的部分到结果字符串中
        strncpy(current, remaining, found - remaining);
        current += found - remaining;

        remaining = found + strlen(subStr);  // 更新剩余的字符串指针
    }

    return result;
}

int main() {
    const char* mainStr = "Hello World! This is a test.";
    const char* subStr = "is ";

    char* result = removeSubstring(mainStr, subStr);
    printf("Result: %s\n", result);

    free(result);  // 释放结果字符串的内存

    return 0;
}

Result: Hello World! Th a test.