spintf函数把格式化的数据写入到字符串中
sprint()功能
1.把其他类型的数据转化成字符串
2.字符串连接
#include <windows.h> #include <stdio.h>int main(){/*sprintf原型：int _cdecl sprintf(char* _Dest,const char* _Format,...)功能：把格式化的数据写入到_Dest字符串中，返回值：字符串的长度(strlen)//格式化：百分比，精确小数点后几位，二、八、十、十六进制输出，左右对齐，日期时间*///格式化数据字符串，通常可以取代 itoa()等函数char buffer[200];//若改成char* buffer;有问题 char c = '1';int i = 35; float f = 1.7320534f;sprintf( buffer, "%c",c); //输出“1”sprintf( buffer, "%d",i); //输出“35” sprintf( buffer, "%.3f",f); //输出“1.732”//连接字符串，通常可以取代 strcat(),strcatchar* who="I",*whom="CSDN";sprintf(buffer,"%s love %s.\n",who,whom); char s[] = "computer";int j=0; j = sprintf( buffer, " String: %s\n", s ); j += sprintf( buffer + j, " Character: %c\n", c ); j += sprintf( buffer + j, " Integer: %d\n", i ); j += sprintf( buffer + j, " Real: %f\n", f );// Note: sprintf is deprecated; consider using sprintf_s insteadprintf( "Output:\n%s\ncharacter count = %d\n", buffer, j ); //Unicode版本的swprintf(),wprintf()。注意字符串前面的L wchar_t buf[100];int len = swprintf( buf, L"%s", L"Hello world" );wprintf( L"wrote %d characters: %s\n", len,buf ); //输出 11 Hello Worldlen = swprintf( buf,L"%s", L"Hello\xffff world" );// swprintf fails because string contains WEOF (\xffff)wprintf( L"wrote %d characters: %s\n", len,buf );// 输出 -1 Hello？system("pause");//sprintf_s()是sprintf()的安全版本，通过指定缓冲区长度来避免sprintf()存在的溢出风险return 0;}