Here are the errors. The numbers at the end of each description are the line numbers. (i.e. The first error is on line 32.)

Error 1 error C2664: 'enterStudents' : cannot convert parameter 1 from 'int [25]' to 'int' 32
Error 2 error C2664: 'searchData' : cannot convert parameter 1 from 'int [25]' to 'int' 35
Error 3 error C2664: 'calculateAvg' : cannot convert parameter 2 from 'int [25]' to 'int' 38
Error 4 error C2664: 'printData' : cannot convert parameter 2 from 'int [3]' to 'int' 41
Error 5 error C2440: 'initializing' : cannot convert from 'const char [2]' to 'char' 58
Error 6 error C2440: 'initializing' : cannot convert from 'const char [2]' to 'char' 58
Error 7 error C2664: 'strcpy' : cannot convert parameter 1 from 'char' to 'char *' 77
Error 8 error C2664: 'strcpy' : cannot convert parameter 1 from 'char' to 'char *' 78
Error 9 error C2027: use of undefined type 'enterStudents::aStud' 82
Error 10 error C3861: 'malloc': identifier not found 82
Error 11 error C2440: '=' : cannot convert from 'int **' to 'int' 85
Error 12 error C2228: left of '.average' must have class/struct/union 109
Error 13 error C2228: left of '.average' must have class/struct/union 109
Error 14 error C2228: left of '.firstName' must have class/struct/union 111
Error 15 error C2228: left of '.lastName' must have class/struct/union 112
Error 16 error C2228: left of '.average' must have class/struct/union 113
Error 17 error C2228: left of '.average' must have class/struct/union 116
Error 18 error C2228: left of '.average' must have class/struct/union 116
Error 19 error C2228: left of '.firstName' must have class/struct/union 118
Error 20 error C2228: left of '.lastName' must have class/struct/union 119
Error 21 error C2228: left of '.average' must have class/struct/union 120
Error 22 error C2228: left of '.average' must have class/struct/union 139
Error 24 error C2100: illegal indirection 153
Error 25 error C2100: illegal indirection 153
Error 26 error C2100: illegal indirection 153
Error 27 error C2100: illegal indirection 155
Error 28 error C2100: illegal indirection 155
Error 29 error C2100: illegal indirection 155