C语言中字符串拷贝函数的实例

#include <string.h> /* strcpy */

void SafeCopy(char *Dest, int DestSize, char *Source);

main()
{
    char Text1[20]="Tracy Sorrell";  /* string buffer */
    char Text2[10]="Martin";         /* string buffer */

    printf (" Original string contents are: %s\n", Text2);

    SafeCopy(Text2, sizeof(Text2), Text1);
 
    printf (" New string contents are: %s\n", Text2);

    strcpy(Text2, "Alex");
 
    printf (" Final string contents are: %s\n", Text2);

}

/****************************************************************/

void SafeCopy(
    char     *Dest,                   /* Destination buffer. */
    int       DestSize,
    char     *Source)                 /* Source data. */
{
 
    /* ... Copy 'Source' into 'Dest'.
     * ...        'Dest' is padded with NULLs if 'Source' is smaller.. */
 
    strncpy(Dest, Source, DestSize);
 
    /* ... Safety net! Add the NULL just in case 'Source' is larger
     * ... than 'Dest'.  */
 
    Dest[DestSize-1] = '\0';
}

本文地址：http://com.8s8s.com/it/it25821.htm