strlen鍑芥暟鏄疌璇█涓殑瀛楃涓插鐞嗗嚱鏁帮紝鐢ㄤ簬璁＄畻瀛楃涓茬殑闀垮害锛堜笉鍖呮嫭瀛楃涓叉湯灏剧殑绌哄瓧绗︹€橽0鈥欙級銆備娇鐢ㄦ椂闇€瑕佸寘鍚ご鏂囦欢<string.h>銆?/p>

鍑芥暟鍘熷瀷锛?/p>

size_t strlen(const char *s);

鍙傛暟璇存槑锛?/p>

s锛氭寚鍚戣璁＄畻闀垮害鐨勫瓧绗︿覆鐨勬寚閽堛€?/p>

杩斿洖鍊硷細

瀛楃涓茬殑闀垮害锛堜笉鍖呮嫭瀛楃涓叉湯灏剧殑绌哄瓧绗︹€橽0鈥欙級銆?/p>

绀轰緥锛?/p>

#include <stdio.h>

#include <string.h>

int main()

{

char str[] = 鈥淗ello, world!鈥?

printf(鈥滃瓧绗︿覆鐨勯暱搴︿负锛?ld\n鈥? strlen(str));

return 0;

}

杈撳嚭锛?/p>

瀛楃涓茬殑闀垮害涓猴細13