C語(yǔ)言函數(shù)大全(s開(kāi)頭)(1)

函數(shù)名: sbrk
    功 能: 改變數(shù)據(jù)段空間位置
    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;
    }
    函數(shù)名: scanf
    功 能: 執(zhí)行格式化輸入
    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;
    }
    函數(shù)名: searchpath
    功 能: 搜索DOS路徑
    用 法: char *searchpath(char *filename);
    程序例:
    #include
    #include
    int main(void)
    {
    char *p;
    /* Looks for TLINK and returns a pointer