函数名: tolower
功 能: 把字符转换成小写字母
用 法: int tolower(int c);
程序例:
#include
#include
#include
int main(void)
{
int length, i;
char *string = “THIS IS A STRING”;
length = strlen(string);
for (i=0; i
string[i] = tolower(string[i]);
}
printf(“%s\n”,string);
return 0;
}
函数名: toupper
功 能: 把字符转换成大写字母
用 法: int toupper(int c);
程序例:
#include
#include
#include
int main(void)
{
int length, i;
char *string = “this is a string”;
length = strlen(string);
for (i=0; i
string[i] = toupper(string[i]);
}
printf(“%s\n”,string);
return 0;
}
——————————————————————————————
#include
#include
#include
#include
int main(void)
{
int length, i;
char string[20]= “this is a string”;
length = strlen(string);
for (i=0; i
string[i] = toupper(string[i]);
}
printf(“%s\n”,string);
system(“pause”);
return 0;
}
