计算机C语言精讲课件双语

1、1,Chap 7 arrays 数 组,2,7.2 one-dimensional arrays,1、declaration of one-dimensional arrays type array-namesize; For example: int a10; char c200; float f5;,3,2、array item,array-namesize; arrange：0，size-1 int a10; a0、a1、 a9 array-namesubscript a10 overflow scanf(%d, ,4,initialization of one-demensional

2、array,type array-namesize=list of values; int a10 = 1,2,3,4,5,6,7,8,9,10; a0=1, a1=2,. a9=10,5,int b5 = 1, 2, 3; b0 = 1, b1 = 2, b2 = 3, b3 = ?, b4 = ? int a = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;,6,for(i = 0; i n; i+) printf(%d , ai);,7,Input 10 numbers ,save them in arrays, then print them,8,Calculate an

3、d print the first m Fibonacci numbers 1, 1, 2, 3, 5, 8, 13, f0 = f1 = 1 fn = fn-1 + fn-2 2n19,Fibonacci numbers 1,1,2,3,5,8,13,21,34,55,#include int main(void) int i; int fib20 = 1, 1; for(i = 2; i 20; i+) fibi = fibi - 1 + fibi - 2; for(i = 0; i 20; i+) printf(%6d, fibi); if(i + 1) % 5 = 0) printf(

4、n); return 0; ,1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597 2584 4181 6765,10,Input 5 integers ，save them in array ，then input one number x， to find x in array， if you can find，print its subscript, otherwise print “Not Found”。 Input ：2 9 8 9 6 9 Output ：1 Input ：2 9 8 9 6 7 output：Not Found,E

5、xample:,#include int main(void) int i, flag, x; int a5; printf(“Enter 5 integers: ); for(i = 0; i 5; i+) scanf(%d, ,Enter 5 integers: 2 9 8 1 9 Enter x: 9 Index is 1,Enter 5 integers: 2 9 8 1 9 Enter x: 7 Not Found,12,Output minimum,Input m numbers, then print the minimum,13,#include int main(void)

6、int i, min, n; int a10; printf(“Enter n: ); scanf(%d, ,print minimum,Enter n: 6 Enter 6 integers: 2 9 -1 8 1 6 min is -1,14,Input m numbers, then print the minimum and subscript Index is subscript of minimum aindex is minimum,print minimum and subscript,15,#include int main(void) int i, index, n; in

7、t a10; printf(“Enter n: ); scanf(%d, ,program,Enter n: 6 Enter 6 integers: 2 9 -1 8 1 6 min is -1 sub is 2,16,Chang two numbers x y x=y y=x Z=x x=y y=z,17,Input n(n a0,Change minimum,selection sort,Inout n(n10), then input n numbers ,print them from small To large For example n=5 3 5 2 8 1,(1) 1 5 2

8、 8 3 (2) 2 5 8 3 (3) 3 8 5 (4) 5 8,19,5 2 8 1 (n=5) Find minimum from 5 numbers (a0a4) ，exchange it and a0 1 5 2 8 3 a4 a0 Find minimum from 4 numbers(a1a4) ，exchange it and a1 (2) 1 2 5 8 3 a2 a1 Find minimum from 3 numbers(a2a4) ，exchange it and a2 (3) 1 2 3 8 5 a4 a2 Find minimum from 3numbers(a2

9、a4) ，exchange it and a3 (4) 1 2 3 5 8 a4 a3,20,(1) Find minimum from n numbers (a0an) ，exchange it and a0 (2) Find minimum from n-1 numbers(a1an) ，exchange it and a1 (n-1) Find minimum from 2 numbers (an-2an-1) ，exchange it and an-2,21,selection sort,for(k = 0; k n-1; k+) index = k; for(i = k + 1; i

10、 n; i+) if(ai aindex) index = i; temp = aindex; aindex = ak; ak = temp; ,Enter n: 5 Enter 10 integers: 3 5 2 8 1 After sorted: 1 2 3 5 8,23,Two-dimensional arrays,24,declaration of two-dimensional arrays,1、 type array-namerow-sizecolumn-size; int a32; a00 a01 a10 a11 a20 a21 int b510;,25,initializat

11、ion of two-dimensional arrays,1、int a33 = 1,2,3,4,5,6,7,8,9; int b43 = 1,2,3, ,4,5; static int b 3=1,2,3,4,5,Array a 1 2 3 4 5 6 7 8 9,Array b 1 2 3 0 0 0 4 5 0 0 0 0,2 int a33 = 1,2,3,4,5,6,7,8,9; int b43 = 1,2,3,0,0,0,4,5;,26,When the array is completely initialized with all values,we need not spe

12、cify the size of the first dimension int a 3=1,2,3,4,5,6,7,8,9; static int b 3=1,2,3,4,5,Array a 1 2 3 4 5 6 7 8 9,Array b 1 2 3 0 0 0 4 5 0 0 0 0,27,Nesting of loop for two-dimensional arrays,Declare a array with two cows and three columns , input data then display them,28,Declare matrix a with thr

13、ee cows and two columns，the value of the element is computed as follows: aij = i + j（0i2，0j1） Display this matrix,int a32; a00 a01 a10 a11 a20 a21,0 1 1 2 2 3,29,#include int main(void) int i, j; int a32; for(i = 0; i 3; i+) for(j = 0; j 2; j+) aij = i + j; for(i = 0; i 3; i+) for(j = 0; j 2; j+) pr

14、intf(%4d, aij); printf(n); return 0; ,a00 a01 a10 a11 a20 a21,i = 0 j = 0 i = 0 j = 1 i = 1 j = 0 i = 1 j = 1 i = 2 j = 0 i = 2 j = 1,program,0 1 1 2 2 3,30,int aNN; N is integer data aij：arrange of the value of i、j :0，N-1 maindiagonal of a squarematrix upper triangular matrix low triangular matrix,31,About matrix of size n*n a00 a01 a02 主对角线 a10 a11 a12 上三角 a20 a21 a22 下三角,i=j i=j,32,Display upper triangular matrix For(i=0;i3;i+) For(j=i;j3;j+) Display low triangular matrix For(i=0;i3;i+) For(j=0;j=i;j+),33