String Manipulation

Hi Guys,

 If i have string like "s+10+d+k" and i like to input the values and s,d,k and calculate the values

 

for example s =10 d =10 k=10

there fore total is =40 but "s+10+d+k" this is string .. if yiou guys help me to provide some piece of code. it would be grt help.

 

thanks

ashi
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