The C Programming language Chapter 4 Input and Output 皿n例inta=1234; float f=123.456; char ch=a printf( %8d, %2dn, a, a) printf( %f, %8f, %8.1f,%o2f,%.2en', f, f, f, f) printf( %o3cn', ch); 运行 1234.1234 static char a[=Hello, world! printf( %osn%15sn%10.5s n%2.5sn%3s n, a, a, a, a, a) 运行结果: Hello, world! Hello world! Hello Hello HelThe C Programming Language Chapter 4 Input and Output 例 int a=1234; float f=123.456; char ch=‘a’; printf(“%8d,%2d\n”,a,a); printf(“%f,%8f,%8.1f,%.2f,%.2e\n”,f,f,f,f,f); printf(“%3c\n”,ch); 运行 1234,1234 结果： 123.456000,123.456000, 123.5,123.46,1.23e+002 a static char a[]=“Hello,world!” printf(“%s\n%15s\n%10.5s\n%2.5s\n%.3s\n”,a,a,a,a,a); 运行结果：Hello,world! Hello,world! Hello Hello Hel m.n