字符串小写变大写

[ivefire]

windows下有strupr函数，linux7.2下有什么相似的函数，在哪个头文件声明的？

[yuanlei1978113]

#include <ctype.h>

int toupper(int c);
int tolower(int c);

DESCRIPTION
toupper() converts the letter c to upper case, if possible.

tolower() converts the letter c to lower case, if possible.

If c is not an unsigned char value, or EOF, the behaviour of these
functions is undefined.

RETURN VALUE
The value returned is that of the converted letter, or c if the conver-
sion was not possible.

[HostOOP]

为什么自己不写呢？

char *strupr(char *str)
{
char *tmp = str;

while (*str != '\0')
{
if (*str >='a' && *str<='z')
*str -= 32;
}
return tmp;
}

[applezhang]

void strupr(char *pcSrc)
{
int i;
whille(*pcSrc!='\0')
{
for (i=0; i<strlen(pcSrc);i++)
{
if (pcSrc[i] >= 'a' && pcSrc[i] <= 'z') pcSrc[i] -= 32;
}
}
}

[linaxing]

用toupper()自己写一个。

[autoegg]

根据ASCII码自己写一个也不麻烦。：）