[C++知识库]C语言字符串拼接的两种方法

strcat

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

int main()
{
	char *firstName  =  "Hello";
	char * lastName =  "World";
	char *name = (char *) malloc(strlen(firstName)+strlen(lastName));
	strcpy(name,firstName);
	strcat(name,lastName);
	printf("s%\n",name);
	return 0;
}

sprintf

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int main() {
    char *firstName = "Hello";
    char *lastName = "World";
    char *name = (char *) malloc(strlen(firstName) + strlen(lastName));
    sprintf(name, "%s%s", firstName, lastName);
    printf("%s\n", name);
    return 0;
}