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                # C 程序:在不使用`strcat`的情況下連接兩個字符串 > 原文: [https://beginnersbook.com/2015/02/c-program-to-concatenate-two-strings-without-using-strcat/](https://beginnersbook.com/2015/02/c-program-to-concatenate-two-strings-without-using-strcat/) 在下面的程序中,將要求用戶輸入兩個字符串,然后程序將它們連接起來。對于連接,我們沒有使用標準庫函數`strcat()`,而是編寫了一個邏輯來在第一個字符串的末尾附加第二個字符串。 #### 用于字符串連接的 C 程序 ```c /* C program to concatenate two strings without * using standard library function strcat() */ #include <stdio.h> int main() { char str1[50], str2[50], i, j; printf("\nEnter first string: "); scanf("%s",str1); printf("\nEnter second string: "); scanf("%s",str2); /* This loop is to store the length of str1 in i * It just counts the number of characters in str1 * You can also use strlen instead of this. */ for(i=0; str1[i]!='\0'; ++i); /* This loop would concatenate the string str2 at * the end of str1 */ for(j=0; str2[j]!='\0'; ++j, ++i) { str1[i]=str2[j]; } // \0 represents end of string str1[i]='\0'; printf("\n輸出: %s",str1); return 0; } ``` **輸出:** ![string_concat](https://img.kancloud.cn/cc/16/cc16841e646305b691c9e4a719028f7f_557x284.jpg) 正如您所看到的,我們已經輸入了兩個字符串,并且在程序的輸出中兩個字符串都被連接起來。
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