For i = k - 1 To 1 Step -1 特别是为什么用step?）

s=0,for i=1 to 5,for j=1 to i,for k=j to 4,s=s+1,next k,next j,next i,msgbox s,求详解s= 0For i = 1 To 5For j = 1 To iFor k = j To 4 s = s + 1Next k Next j Next iMsgBox sA.4 B.5 C.38 D.40自己算的和四个选项都不一样. pascal题目 求详解var i,j,k,s:integer;begins:=0;for i:=3 downto 1 dobeginfor j:=1 to 3 dobegink:=0;repeatk:=k+1;s:=s+k;until k=j;end;s:=s-(k+1);end;write('s=',s);end. #include main() { char s[]=12345678; int v[4]={0,1,1,0},k,i; for (k=0; s[k];k++)#includemain(){ char s[]=12345678; int v[4]={0,1,1,0},k,i;for (k=0; s[k];k++){switch (s[k]){case'1':i=0; case'2':i=1;case'3':i=2; case'4':i=3; }v[i]++; }for(k=0;k 求从头到尾解释一个程序 program ee（input,output); var i,j,k,s:=integer; begin s:=0;for i:=3 downto 1 dobeginfor j:=1 to 3 dobegink:=0;repeatk:=k+1;s:=s+k;until k=j;end;s:=s-(k+1);end;write('s=',s);end.为什么s=18以及for语句的阅读 void main(){char *s=12134211,int v[4]={0,0,0,0} k,i ;for(k=0,s[k];k++){ switch(s[k]){ case '1' :i=0 ;case '2' :i=1 ;case '3':i=2 ;case '4' :i=3 ; }v[i]++;}for(k=0,k程序运行结果是_____ s=0,执行语句 for(k=1;k c语言 求1^k+2^k+3^k+……+n^k,假定n=6,k=4#includeint sum(int n,int k){int i;int s=0;for(i=1;i 四位16进制数转化为10进制 pascal帮我看看有哪些错的……program ex2038;var s:string;i,a1,a2,a3,a4,k,dec:integer;beginreadln(s);for i:=1 to 4 doif (s[i]>='A')AND(S[I]='a')and(s[i]='0')and(s[i] s=1 for i=1 to 100 s=s*i endfor s 中的s=1 和s=s*i Dim a(4) s=0 For i=1 to 4 s=s+a(i) Next i 为什么等于81#include main(){int s=0,i,j,k; for(i=1;i s=1 for i=1 to 5 step 2 s=s+i endfor s k=0 for j=1 to 2 for i=1 to 3 k=i+1 next i for i=1 to 7 k=k+1 next i next j print k而且我还不明白print k 或者求变量的不同? For K=1 TO 20 For K=1 TO 20 SET TALK OFF CLEAR FOR I=1 TO 20 FOR J=1 TO 33 FOR K=(100-I*5-J*3)*3 IF I=J=K=100 I,J,K ENDIF ENDFOK=(100-I*5-J*3)*3 提示语法错误SET TALK OFFCLEARFOR I=1 TO 20FOR J=1 TO 33FOR K=(100-I*5-J*3)*3IF I=J=K=100I,J,KENDIFENDFORENDFORENDFORSET TALK ON c语言菜鸟 main() int s,k; for(s=1,k=2;k 为什么For i = 1 To 3 For j = 1 To i For k = j To 3 a = a + 1 Next k Next j Next i print a