c语言标准输入输出详解

C CC C Turbo C2.0 Turbo C2.0 , : - 1.1 1.1.1 Turbo C2.0 printf( ) scanf(), printf()(); scanf() () printf() printf(), -printf(): printf(“, ); : , - ; , “%“, , , , “,“, , 1. Turbo C2.0: %d %u %f %s %c %p %e %x, %X %0 %g : (1). “%“ : %3d 3, 3 %9.2f 9, 2, 6, , 9 %8s 8, 8 , , , ; , , 0, 0 : %04d 4, 0 4 , , : %6.9s 69 9, 9 (2). “%“l, : %ld long %lf double (3). , “%“ “-“ , : %-7d 7 %-10s 10 2. n f r t Tab xhh ASCII16, hh1216 printf(), , , Turbo C2.0 1 #include #include int main() char c, s20, *p; int a=1234, *i; float f=3.141592653589; double x=0.12345678987654321; p=“How do you do“; strcpy(s, “Hello, Comrade“); *i=12; c=x41; printf(“a=%dn“, a); /* a=1234*/ printf(“a=%6dn“, a); /*6 a= 1234*/ printf(“a=%06dn“, a); /*6 a=001234*/ printf(“a=%2dn“, a); /*a2, a=1234*/ printf(“*i=%4dn“, *i); /*4 * i= 12*/ printf(“*i=%-4dn“, *i); /*4 *i=12*/ printf(“i=%pn“, i); /*i=06E4*/ printf(“f=%fn“, f); /*f=3.141593*/ printf(“f=6.4fn“, f); /*64 f=3.1416*/ printf(“x=%lfn“, x); /* x=0.123457*/ printf(“x=%18.16lfn“, x);/*18 16 x=0.1234567898765432*/ printf(“c=%cn“, c); /*c=A*/ printf(“c=%xn“, c); /*ASCII c=41*/ printf(“s=%sn“, s); /* s=Hello, Comrade*/ printf(“s=%6.9sn“, s);/*9 s=Hello, Co*/ printf(“s=%pn“, s); /* s=FFBE*/ printf(“*p=%sn“, p); /* p=How do you do*/ printf(“p=%pn“, p); /*p=0194*/ getch(); retunr 0; 1.#include stdio.h, , Turbo C2.0 , “*.h“, #include #include“*. h“ , , scanf() scanf(), () : scanf(“, ); ; 1. : printf() 2. : scanf() 3. : scanf() , printf() , “,“ 2: main() int i, j; printf(“i, j=?n“); scanf(“%d, %d“, scanf(), , “,“, scanf() , : (1). , , scanf(), “ scanf(“%s“, p); /*/ scanf(“%s“, str); printf(“%sn“, p); /*/ printf(“%sn“, str); (2). “%“ , 310p, scanf() scanf(“%10s“, p); 10, p, scanf(“%s“, str)11 scanf(), : scanf(), : main() char c1, c2; scanf(“%c“, scanf(“%c“, printf(“c1 is %c, c2 is %c“, c21, c2); , A (), scanf (“%c“, scanf(“%c“, fflush(stdin); scanf(“%c“, printf(“c1 is %c, c2 is %c“, c1, c2); 1.1.2 , , , , puts()gets() 1. puts() puts()(), : puts(s); s() puts()printf(“%sn“, s) 4: main() char s20, *f; /* */ strcpy(s, “Hello! Turbo C2.0“); /* */ f=“Thank you“; /* */ puts(s); puts(f); : (1). puts(), (2). puts(): puts(“Hello, Turbo C2.0“); 2. gets() gets()() , : gets(s); s() gets(s)scanf(“%s“, printf(“Whats your name?n“); gets(s); /* */ puts(s); /* */ puts(“How old are you?“); gets(f); puts(f); : (1). gets(s)s, , “Null pointer asignmemt“ putchar()getch()getche()getchar() 1. putchar() putchar(), : putchar(ch); ch putchar()printf(“%c“, ch); 6: #include main() char c: /*/ c=B; /*/ putchar(c); /*/ putchar(x42); /*B*/ putchar(0x42); /*ASCIIB*/ 2. getch()getche()getchar() (1) getch()getche() : getch(); getche(); : getch(), getche() 7: #include main() char c, ch; c=getch(); /* c*/ putchar(c); /*/ ch=getche(); /* ch*/ putchar(ch); , - 8: #include main() char c, s20; printf(“Name:“); gets(s); printf(“Press any key to confinue.“); get