c語(yǔ)言 練習(xí)題

1、1.編寫(xiě)程序，將一個(gè)整數(shù)逆置后輸出如1234逆置后為4321。main()intnas=0scanf(“%d“while(n)a=n%10s=s10an=n10printf(“%d“s)2.統(tǒng)計(jì)字符串當(dāng)中數(shù)字字符出現(xiàn)的次數(shù)#include“stdio.h“main()intn[10]=0i=0s[81]gets(s)while(s[i])if(s[i]=0if(i=0i10i)printf(“%3d“n[i])3.編寫(xiě)程序，計(jì)算nn階矩

2、陣周邊元素絕對(duì)值之和。main()inta[4][4]ijsumsum=0f(i=0i4i)f(j=0j4j)scanf(“%d“(ai)j)if(a[i][j]0)a[i][j]=a[i][j]f(i=0i4i)f(j=0j4j)if(i==0||i==3||j==0||j==3)sum=((ai)j)printf(“sum=%dn“sum)7編寫(xiě)程序，將一個(gè)無(wú)字符整形數(shù)轉(zhuǎn)換成其對(duì)應(yīng)的數(shù)字串#include“stdio.h“main(

3、)inta[20]i=0kintstjscanf(“%d“while(s)a[i]=s%10s=10k=i1f(i=0j=kijij)t=a[i]a[i]=a[j]a[j]=tf(i=0i=ki)print(“%d“a[i])8編寫(xiě)程序，將整型數(shù)組a中的前k個(gè)元素逆置#include“stdio.h“#definen4main()inta[10]ijtf(i=0i10i)scanf(“%d“f(i=0j=nijij)t=a[i]a[i]