C语言字符串操作
一、字符串初始化
[c] # include <stdio.h> # include <string.h> main(){ char str1[4] = "abc"; char str2[4] = {'a', 'b', 'c', '\0'}; printf("%s\n%s\n", str1, str2); } [/c]
二、字符串赋值
[c] # include <stdio.h> # include <string.h> main(){ char str[4]; strcpy(str, "abc"); printf("%s\n", str); } [/c]
三、字符指针赋值
[c] # include <stdio.h> # include <string.h> main(){ char *str; str = "abc"; printf("%s\n", str); } [/c]
四、连接字符串
[c] #include <stdio.h> #include <string.h> int main () { // strcpy 覆盖原字符串头部 // strcat 往字符串空白部分添加 char str[80]; strcpy(str, "these "); strcpy(str, "strings "); strcat(str, "are "); strcat(str, "concatenated."); printf("%s\n", str); return 0; } [/c]
五、分割字符串
[c] #include <stdio.h> #include <string.h> main(){ // strtok 第一个参数先是待分割字符串,然后是 NULL char s[] = "ab-cd : ef;gh :i-jkl;mnop;qrs-tu: vwx-y;z"; char *delim = ":"; char *p; printf("%s ", strtok(s, delim)); while((p = strtok(NULL, delim))) printf("%s\n", p); } [/c]
六、字符串首次出现位置
[c] #include<stdio.h> #include<string.h> int main(){ char *str = "http://see.xidian.edu.cn/cpp/u/xitong/"; char *substr = "see"; char *s = strstr(str, substr); printf("%s\n", s); return 0; } [/c]