主题:是英雄就编这道题
QB爱好者
[专家分:370] 发布于 2007-10-06 21:11:00
输入一个带括号的表达式,允许用:
数字(含负数)
+,-,*,/,\,MOD
要求算出其结果(保留5位小数)
注:
1/7*7=1
5/3*12=20
回复列表 (共17个回复)
11 楼
FFKK [专家分:1610] 发布于 2009-07-21 20:21:00
我也非英雄
12 楼
phile [专家分:2310] 发布于 2009-07-22 11:34:00
FFKK竟敢抄我的!!!!!!!!!!!!!!!!!!
13 楼
梦幻小樱 [专家分:140] 发布于 2009-08-06 13:27:00
CLS
INPUT S$
L = LEN(S$): DIM F$(L), N(L): J = 1
FOR I = 1 TO L
A$ = MID$(S$, I, 1)
IF A$ < "0" OR A$ > "9" THEN
F$(J) = A$: N(J) = VAL(B$): J = J + 1: B$ = ""
ELSE B$ = B$ + A$
END IF
NEXT I: N(J) = VAL(B$)
FOR I = 1 TO J
IF F$(I) = "^" THEN N(I) = N(I) ^ N(I + 1): GOSUB 10
NEXT I
FOR I = 1 TO J
IF F$(I) = "*" THEN N(I) = N(I) * N(I + 1): GOSUB 10
IF F$(I) = "/" THEN N(I) = N(I) / N(I + 1): GOSUB 10
NEXT I
FOR I = 1 TO J
IF F$(I) = "+" THEN N(I) = N(I) + N(I + 1): GOSUB 10
IF F$(I) = "-" THEN N(I) = N(I) - N(I + 1): GOSUB 10
NEXT I
PRINT S$; "="; N(1)
END
10
FOR Q = I TO L - 2: F$(Q) = F$(Q + 1): N(Q + 1) = N(Q + 2): NEXT Q
I = I - 1: J = J - 1
RETURN
14 楼
phile [专家分:2310] 发布于 2009-08-06 17:49:00
楼上你没“()” 、“\”、mod
????????!!!!!!!!!!
15 楼
神秘-赛尔 [专家分:170] 发布于 2010-11-19 22:51:00
[quote]简单简单!!!
CLS
INPUT A$
L = LEN(A$)
DIM A$(L), B(L)
PRINT A$; "=";
DO
Q = INSTR(A$, ")")
IF Q <> 0 THEN
K = 0
DO
K = INSTR(K + 1, A$, "(")
IF K < Q AND K <> 0 THEN P = K
LOOP UNTIL K = 0 OR K > Q
AA$ = MID$(A$, 1, P - 1)
AB$ = MID$(A$, P + 1, Q - (P + 1))
AC$ = MID$(A$, Q + 1)
GOSUB 100
AB$ = LTRIM$(STR$(B(1)))
A$ = AA$ + AB$ + AC$
END IF
LOOP UNTIL Q = 0
AB$ = A$
GOSUB 100
PRINT USING"########.#####";B(1)
END
100
T$ = ""
J = 1
LA = LEN(AB$)
FOR I = 1 TO LA
X$ = MID$(AB$, I, 1)
IF X$ = "-" AND MID$(AB$ , I + 1,1)>="0" AND MID$(AB$ ,I + 1, 1)<="9" THEN
T$=T$+X$
ELSEIF X$ = "+" OR X$ = "-" OR X$ = "*" OR X$ = "/" OR X$ = "\" X$ = "^" OR X$="M" THEN
IF X$ = "M" THEN
X$=X$+MID$(AB$ ,I + 1,2)
I=I+2
END IF
A$(J) = X$
B(J) = VAL(T$)
T$ = ""
J = J + 1
ELSE
T$ = T$ + X$
END IF
NEXT I
B(J) = VAL(T$)
FOR T = 1 TO J
IF A$(T) = "^" THEN B(T) = B(T) ^ B(T + 1): GOSUB 200
NEXT T
FOR T = 1 TO J
IF A$(T) = "*" THEN B(T) = B(T) * B(T + 1): GOSUB 200
IF A$(T) = "/" THEN B(T) = B(T) / B(T + 1): GOSUB 200
NEXT T
FOR T = 1 TO J
IF A$(T) ="\" TTHEN B(T) = B(T) \ B(T + 1): GOSUB 200
NEXT T
FOR T=1 TO J
IF A$(T) = "MOD" THEN B(T) = B(T) MOD B(T + 1):GOSUB 200
FOR T = 1 TO J
IF A$(T) = "+" THEN B(T) = B(T) + B(T + 1): GOSUB 200
IF A$(T) = "-" THEN B(T) = B(T) - B(T + 1): GOSUB 200
NEXT T
RETURN
200
FOR P = T TO LA - 2
A$(P) = A$(P + 1)
B(P + 1) = B(P + 2)
NEXT P
J = J - 1
T = T - 1
RETURN
[em2][/quote]
16 楼
独手编程 [专家分:360] 发布于 2010-11-22 18:39:00
不是英雄,不会做
17 楼
8分钱的 [专家分:10] 发布于 2010-11-26 17:04:00
不懂。看后来的程式学习学习
我来回复