Problem # 1. calculate the grade. Allow a student the next grade if he/she needs only 0.5 marks to obtain the next grade. Use else-if construction.

Transcription

1 ME 172 Lecture 6

2 Problem # 1 Write a program to calculate the grade point average of a 3.00 credit hour course using the data obtained from the user. Data contains four items: attendance (30), class test (60), final exam section A (105), and final exam section B (105) marks. Use the following chart to calculate the grade. Marks Grade Marks Grade Marks Marks Marks Marks Marks Marks < Allow a student the next grade if he/she needs only 0.5 marks to obtain the next grade. Use else-if construction.

3 Source Code for Problem # 1 void main (){ int ct, attn, seca, secb, int_grade, gradei; float gradef,gpa, frac_grade; printf("\nplease enter marks for attendance (30): "); scanf("%d",&attn); printf("\nplease enter marks in class tests (60): "); scanf("%d",&ct); printf("\nplease enter marks in section A (105): "); scanf("%d",&seca); printf("\nplease enter marks in Section B (105): "); scanf("%d",&secb);

4 gradef = (attn + ct + seca + secb )/3.0; int_grade = int (gradef); frac_grade= gradef - int (gradef); if(frac_grade >= 0.5) gradei = int_grade + 1; else gradei = int_grade; if(gradei>=80) gpa =4.00; else if(gradei>=70) gpa = 3.50; else if(gradei>=60) gpa = 3.00; else if(gradei>=50) gpa = 2.50; else if(gradei>=40) gpa = 2.00; else gpa = 0.00; } printf("your obtained GPA is : %4.2f", gpa);

5 Problem # 2 Write a program that will emulate the arithmetic operation of a traditional calculator. For instance, an expression will result 8.5. Only operators +,-,*, x,, / are allowed. Take a prior measure so that the divided by zero situation can be handled. Use a switch-case construction.

6 void main(void) { } int a,b; char op; printf("enter an arithmetic expression: \n "); scanf("%d%c%d",&a,&op,&b); switch(op) { case '+': printf(" = %d,a %d",a+b); break; case '-': printf(" = %d ",a-b); break; case 'x : case '*': printf(" = %d",a*b); break; case '/': case ': if(b!=0) printf(" = %d",a/b); else printf("the value of divisor can't be zero"); break; default : printf("unknown operator! Please follow the instruction."); }

7 Problem # 3 Write a program that will take a character from the keyboard as input and identify it to be vowel or consonant. For any non alphabetic character input the program should forcibly terminate. You may use isalpha() and exit() functions. Use a switch-case construction.

8 #include<stdlib.h> #include<ctype.h> void main(){ char ch; printf("enter any character:"); ch = getche(); printf("\n"); if (isalpha(ch)) printf("%c is alphabetical\n",ch); else { printf("%c is not alphabetical\n",ch); printf("the program is terminating."); getch(); exit(0); }

9 switch(ch){ case 'a': case 'A': case 'e': case 'E': case 'i': case 'I': case 'o': case 'O': case 'u': case 'U': printf("\n\"%c\" is a vowel",ch); break; default : printf("\n\"%c\" \ \ is a consonant", ch); break; } getch(); }

10 Do Yourself Write a program to calculate the grade point average of a 3.00 credit hour course using the data obtained from the user. Data contains four items: attendance (30), class test (60), final exam section A (105), and final exam section B (105) marks. Use the following chart to calculate the grade. Marks Grade Marks Grade Marks Marks Marks Marks Marks Marks < Allow a student the next grade if he/she needs only 0.5 marks to obtain the next grade. Use else-if construction.

11 Do Yourself Write a program that will emulate the arithmetic operation of a traditional calculator. For instance, an expression will result 8.5. Only operators +,-,*, x,, / are allowed. Take a prior measure so that the divided by zero situation can be handled. Use a switch-case construction. Write a program that will take a character from the keyboard as input and identify it to be vowel or consonant. For any non alphabetic character input the program should forcibly terminate. You may use isalpha() and exit() functions. Use a switch-case construction.

12 Exercise # 1 Write a program that will take the number of hours a machine is running as input. User should enter the current time and the starting time of the machine few hours prior to the current time. Starting should be after 8.00 am. The program should then calculate the corresponding temperature using the Temp vs. Hour graph. T C 50 0 C hr

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