20250913 By Felix
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def calc(ex):
try:
if type(float(ex)) == float:
return float(ex)
except:
pass
exp = ex
z = [a.strip() for a in exp.split("(")]
if len(z) > 1:
for i in range(len(z)-1,0,-1):
zz = [a.strip() for a in z[i].split(")",1)]
if len(zz) > 1:
print(f'bf(): {tmp}')
tmp = calc(zz[0])
z[i-1]=(z[i-1]+str(tmp)+zz[1])
exp = z[i-1]
print(f'bf(): {exp}')
else:
print("input not correct")
return -1
print('1:',z)
z = [a.strip() for a in exp.split("+")]
print('2:',z)
if "" in z:
print("input not correct")
return -1
if len(z) > 1:
tmp = calc(z[0])
for i in range(len(z)-1):
print('3:',i)
tmp += calc(z[i+1])
print('+tmp',tmp)
return tmp
#print(z)
z = [a.strip() for a in exp.split("-")]
if "" in z:
print("input not correct")
return -1
if len(z) > 1:
tmp = calc(z[0])
#print('tmp',tmp,z[0])
for i in range(len(z)-1):
tmp -= calc(z[i+1])
print('-tmp',tmp)
return tmp
z = [a.strip() for a in exp.split("*")]
if "" in z:
print("input not correct")
return -1
if len(z) > 1:
print(f'bf: {z}')
tmp = calc(z[0])
print(f'aft z[0]: {tmp}')
for i in range(len(z)-1):
tmp *= calc(z[i+1])
print('*tmp',tmp)
return tmp
z = [a.strip() for a in exp.split("/")]
if "" in z:
print("input not correct")
return -1
if len(z) > 1:
tmp = calc(z[0])
for i in range(len(z)-1):
tmp /= calc(z[i+1])
print('/tmp',tmp)
return tmp
print("input not correct")
return -1
#print(calc("1-2+6-4/3/3-8*8+3-6/3"))
#print(calc("(4/5)+1/(1+3)"))
#print(calc("4/((5+1))/(1+3)"))
print(calc('1+2*2+3+4-5-6+7+8'))
Python
INFO