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                # C 程序:連接兩個字符串 > 原文: [https://www.programiz.com/c-programming/examples/concatenate-string](https://www.programiz.com/c-programming/examples/concatenate-string) #### 在此示例中,您將學習手動連接兩個字符串,而無需使用`strcat()`函數。 要理解此示例,您應該了解以下 [C 編程](/c-programming "C tutorial")主題: * [C 數組](/c-programming/c-arrays) * [C 編程字符串](/c-programming/c-strings) * [C `for`循環](/c-programming/c-for-loop) * * * 如您所知,在 C 編程中連接兩個字符串的最佳方法是使用`strcat()`函數。 但是,在此示例中,我們將手動連接兩個字符串。 * * * ## 在不使用`strcat()`的情況下連接兩個字符串 ```c #include <stdio.h> int main() { char s1[100] = "programming ", s2[] = "is awesome"; int i, j; // length of s1 is stored in i for (i = 0; s1[i] != '\0'; ++i) { printf("i = %d\n", i); } // concatenating each character of s2 to s1 for (j = 0; s2[j] != '\0'; ++j, ++i) { s1[i] = s2[j]; } // terminating s1 string s1[i] = '\0'; printf("After concatenation: "); puts(s1); return 0; } ``` **輸出** ```c After concatenation: programming is awesome ``` 在這里,字符串`s1`和`s2`連接在一起,結果存儲在`s1`中。 重要的是要注意,`s1`的長度應足以在連接后容納字符串。 如果沒有,您可能會得到意外的輸出。
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