**Errors, input method problems. Check for grammatical or logical errors. If you are using a non-standard input method (such as file, network, etc.), you need to use other functions to read the input data.
Network, invasion and deletion) method 1 can directly change scanf to scanf s, because the compiler thinks that scanf s is a safer function.
When no strings are involved, there is almost no difference between the two, except that when using scanf, add a line to the precompile crt secure no deprecate. So much so that I didn't take it seriously. Once strings can be involved, remember to add boundary restrictions.
Set the property of the security check item to disable;Compile and run it again, and it will work normally. After the above methods, you can solve the problem of prompting the use of scanf s and other functions when using VS under the win7 system, I hope the above tutorial content can help you.
network, invasion and deletion) have some differences, but it only needs to be changed slightly. Your specific questions should be analyzed in detail, and they should be posted. VS2015 can use scanf() and printf(), and compilation can also pass, but the security is not as good as scanf s() and printf s() strengthened by ms.
1. fscanf s needs to specify the size of the buffer to read the string from the file, that is, only %10s is not enough, add a parameter after s to indicate the size of s, as follows: fscanf s(df,%10s,s,11);If there is still an error, check the read and write location of the current file and try again.
2. Your program is not complete, you look elsewhere** used the fscanf s function When you use this function, the first parameter must be of type file *.
network, invasion and deletion) 3. fp is a file pointer s means to read a string s means to put the read string into the s variable tidy up: fscanf(fd, %s, s), which means to read a string from the file and put it in the string variable s.
4. Another point, the file opened by fopen s cannot be shared, and if the file you open needs to be shared, you cannot use the fopen s function. You can consider the fsopen and wfsopen functions. As for the warning prompted by Microsoft, it can be used as a reference for you, and as for whether to change it or not, it's your own business.
You don't allocate memory, you just define a pointer, you have to assign a value, and of course you will brute force access.
scanf(%d，&n)；printf(%d，n)；After that, you can judge the value of n and decide whether to execute the following statement.
int val；std：cin val；At this point, I don't know if the user is entering an int type. What to do. Other functions by calling the cin object. When the user enters the content and cannot complete the flow operation, a logic error will be generated. At this point, std:cinfail() returns true.
int i，b[50]，sum=0，count=0；Change to int i=0,b[50],sum=0,count=0;Can.
Here are 3 ways to see the results directly on the screen and avoid exiting the program without seeing the output information: Run your program from the cmd command line.
This is a warning, not a bug. Can be ignored. Scanf doesn't check boundaries, it's a feature of Scanf itself. This warning is to say that for added security, scanf s can be used instead. But scanf s is not an ansi c function, and the written ** has lost good portability and is not recommended to use.
First your program has an error: scanf(%d,c);scanf(%d%d，a，b)；It should be scanf(%d,&c);scanf(%d%d，&a，&b)；Second, debugging must be compiled first, and there is no problem before debugging.
Because of the security considerations, VS2010 is different from VC in terms of format input and output control, and other problems that cannot be run depend on the error message to be modified, after all, the more secure the program, the better. At this point, you don't feel the difference between scanf and scanf, you can check the function manual to see that there are many kinds of input and output.
The scanf output function, transported to the space or the newline jump tab key indicates the end of the input of a data, but in its input format, %d will also read the carriage return character into the cache, and wait until the second carriage return or space to indicate the end of a data input Therefore, the above situation occurs.
scanf() don't split numbers with commas, try using spaces. You have a problem with the C language, and there are C++* and win functions on it. It is suggested that the source file suffix be changed to: C is opened again, and the irrelevant ** above is cleared, so that it is pure C language**.