Each of the following declarations, programs, and program segments has errors. Locate as many as you can. struct ThreeVals { int a, b, c; }; int main () { TwoVals s, *sptr; sptr = &s *sptr.a = 1; return 0; }

Short Answer

Expert verified
Question: In the given code snippet, identify the errors, and provide a step-by-step solution by pointing out the necessary fixes. Answer: The initial code snippet has errors in structure declaration, structure member declaration, and pointer member access syntax. The step-by-step solution to fix these errors is as follows: 1) First, correct the structure declaration by changing "struct ThreeVals" to "struct TwoVals". 2) Update the structure member declaration for "struct TwoVals" by removing one member, so it has only 'a' and 'b'. 3) Modify the pointer member access syntax by using "->" instead of "." in the line "sptr->a = 1;". The corrected code snippet should be: struct TwoVals { int a, b; }; int main() { TwoVals s, *sptr; sptr = &s sptr->a = 1; return 0; }

Step by step solution

01

Structure Declaration Correction

There is an error in the structure declaration. It has been declared as "struct ThreeVals", but the program uses "TwoVals" in the main function. Therefore, we should change the structure declaration to "struct TwoVals".
02

Structure Member Declaration

The structure "struct TwoVals" should have two members only, but the initial structure postulates three members. We need to remove one of the members, and update the structure as follows: struct TwoVals { int a, b; };
03

Pointer Member Access Syntax Modification

In C++, to access a structure member through a pointer, we need to use the "->" operator instead of the "." operator. So change the line "*sptr.a = 1;" to "sptr->a = 1;" After taking these steps, the corrected code snippet should look like this: struct TwoVals { int a, b; }; int main() { TwoVals s, *sptr; sptr = &s sptr->a = 1; return 0; }

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