C语言函数大全(s开头)(1)

文章作者 100test 发表时间 2007:03:10 17:25:40
来源 100Test.Com百考试题网

函数名: sbrk
功 能: 改变数据段空间位置
用 法: char *sbrk(int incr).
程序例:
#include
#include
int main(void)
{
printf("Changing allocation with sbrk()\n").
printf("Before sbrk() call: %lu bytes free\n",
(unsigned long) coreleft()).
sbrk(1000).
printf(" After sbrk() call: %lu bytes free\n",
(unsigned long) coreleft()).
return 0.
}


函数名: scanf
功 能: 执行格式化输入
用 法: int scanf(char *format[,argument,...]).
程序例:
#include
#include
int main(void)
{
char label[20].
char name[20].
int entries = 0.
int loop, age.
double salary.
struct Entry_struct
{
char name[20].
int age.
float salary.
} entry[20].
/* Input a label as a string of characters restricting to 20 characters */
printf("\n\nPlease enter a label for the chart: ").
scanf(" s", label).
fflush(stdin). /* flush the input stream in case of bad input */
/* Input number of entries as an integer */
printf("How many entries will there be? (less than 20) ").
scanf("%d", &.entries).
fflush(stdin). /* flush the input stream in case of bad input */
/* input a name restricting input to only letters upper or lower case */
for (loop=0.loop
{
printf("Entry %d\n", loop).
printf(" Name : ").
scanf("%[A-Za-z]", entry[loop].name).
fflush(stdin). /* flush the input stream in case of bad input */
/* input an age as an integer */
printf(" Age : ").
scanf("%d", &.entry[loop].age).
fflush(stdin). /* flush the input stream in case of bad input */
/* input a salary as a float */
printf(" Salary : ").
scanf("%f", &.entry[loop].salary).
fflush(stdin). /* flush the input stream in case of bad input */
}
/* Input a name, age and salary as a string, integer, and double */
printf("\nPlease enter your name, age and salary\n").
scanf(" s %d %lf", name, &.age, &.salary).

/* Print out the data that was input */
printf("\n\nTable %s\n",label).
printf("Compiled by %s age %d $.2lf\n", name, age, salary).
printf("-----------------------------------------------------\n").
for (loop=0.loop
printf("M | %-20s | ] | .2lf\n",
loop 1,
entry[loop].name,
entry[loop].age,
entry[loop].salary).
printf("-----------------------------------------------------\n").
return 0.
}


函数名: searchpath
功 能: 搜索DOS路径
用 法: char *searchpath(char *filename).
程序例:
#include
#include
int main(void)
{
char *p.
/* Looks for TLINK and returns a pointer