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#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h> #include <assert.h> #include <string.h> char *My_strcat(char *arr2, const char *arr) { assert(arr2 != NULL); assert(arr != NULL); char *ret = arr2; int num = 0; num = strlen(arr2); arr2 += num; while (*arr2++ = *arr++) { ; } return ret; } int main() { char arr[] = "ghijkl"; char arr2[13] = "abcdef"; printf("%s\n", My_strcat(arr2, arr)); system("pause"); return 0; }