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Hi there, looking for a little help with C+ If I ask for an input which is supposed to be an integer, and the user enters a string, how do I stop the program from crashing. Help greatly appreciated! |
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I don't know c+ but wouldn't you have to have a routine that validated the user's input and checked it was in the right format, and that if it contained any erroneous characters to ABORT ABORT, before proceeding with the ... whatever your program does. |
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in php there is a function to tell you what type a variable is.. i don;t know what it's called |
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const char* str_int = "777"; const char* str_float = "333.3"; int i = atoi(str_int); float f = atof(str_float); Try that ... |
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(psuedocode) If cin = ascii 41 to 49 then Allow person to enter characters else "" Something like that maybe? |
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I heard there was some kind of string to integer translator, but I've no idea how THAT would work - it's a doozie! |
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C or C++ Knowing you it will be C++ :) I have to go to bed now but read the input in as a string. You are best using the iostream header file and have a look at passing the string to istringstream. Off the top of my head (this may be wrong), something like std::istringstream i(s); int x; if(!(i >> x)){ throw your error handling bit } return x; |
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10 print "hi" 20 goto 10 |
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Try 10 print "010101 is the best!!" 20 goto 10 |
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you beat me to it!!!! |
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basic <3 |
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hehe I love those old 10 PRINT 20 GOTO 10 old school codes! reminds me of my spectrum days long long ago |
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