C 语言拼接字符串

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C 语言拼接字符串
一、使用strcat进行字符串拼接

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. #include <string.h>
   
4. 
   
5. int main() {
   
6.     char *firstName = "Theo";
   
7.     char *lastName = "Tsao";
   
8.     char *name = (char *) malloc(strlen(firstName) + strlen(lastName));
   
9.     strcpy(name, firstName); // 把firstName复制到name中
   
10.     strcat(name, lastName); // 把lastName追加到name中
    
11.     printf("%s\n", name);
    
12.     return 0;
    
13. }
    

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二、 使用sprintf进行字符串拼接

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. #include <string.h>
   
4. 
   
5. int main() {
   
6.     char *firstName = "Theo";
   
7.     char *lastName = "Tsao";
   
8.     char *name = (char *) malloc(strlen(firstName) + strlen(lastName));
   
9.     // 发送格式化输出到name指定的字符串
   
10.     sprintf(name, "%s%s", firstName, lastName);
    
11.     printf("%s\n", name);
    
12.     return 0;
    
13. }
    

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