C OPERATORS PRECEDENCE AND ASSOCIATIVITY

Rank	Operator	Explanation	Associativity
1	() [] . ->	Parenthesis Square brackets Direct Member selection Indirect Member selection	Left to right
2	++ -- ! ~ (type) & *	Increment Decrement Logical negation Bitwise complement Type casting Address Pointer reference	Right to left
3	* / %	Multiplication Division Remainder	Left to right
4	+ -	Addition Subtraction	Left to right
5	<<  >>	Left shift Right shift	Left to right
6	<  <= >  >=	Less than Less than or equal to Greater than Greater than or equal to	Left to right
7	== !=	Equal to Not equal to	Left to right
8	&	Bitwise AND	Left to right
9	^	Bitwise exclusive OR	Left to right
10	|	Bitwise Inclusive OR	Left to right
11	&&	Logical AND	Left to right
12	||	Logical OR	Left to right
13	?:	Ternary operator	Right to Left
14	= *= /= %= += -= &= ^= |= <<= >>=	Assignment Multiplication assignment Division assignment Modulus assignment Addition assignment Subtraction assignment Bitwise And assignment Bitwise inclusive assignment Bitwise exclusive assignment Bitwise shift left assignment Bitwise shift right assignment	Right to left
15	,	Comma	Left to right

 

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C program using all 32 keywords available in ANSCII

Question:WAP in c using all 32 keyword available in ANSCII

solution

#include ⁢stdio.h>
#include ⁢stdlib.h>
const signed sub = 5;
typedef enum number {student1, student2, student3};
union Job {
     unsigned int  Tyear;
     volatile int Lyear;
} T;
extern float grade=3.0;
 struct
{
    char fn[12],ln[8];
    short int sn,cpl,egp,mat,tsm,phy,t;
     float per;
}student[3];
static long int i=0;
int main()
{
   auto int choice;
    for(i=0;i<3;i++)
    {
        printf("Enter student %d first name:",i+1);
        scanf("%s",student[i].fn);
        printf("Enter student %d second name:",i+1);
        scanf("%s",student[i].ln);
        printf("Enter student number:");
        scanf("%d",&student[i].sn);
        printf("Enter CPL101 marks:");
        scanf("%d",&student[i].cpl);
        printf("Enter EGP101 marks:");
        scanf("%d",&student[i].egp);
        printf("Enter MAT102 marks:");
        scanf("%d",&student[i].mat);
        printf("Enter TSM101 marks:");
        scanf("%d",&student[i].tsm);
        printf("Enter PHY101 marks:");
        scanf("%d",&student[i].phy);
        student[i].t = student[i].phy+student[i].tsm+student[i].mat+student[i].egp+student[i].cpl;
        student[i].per=student[i].t/sub;
    }
    retry:
    printf("Press\n 1: to see Highest Percentage\n 2:to see overall grading\n 3:to print result\n" );
    scanf("%d",&choice);
    switch(choice)
    {
        case 1: printf("the Highest percentage is:");
                topper();
                break;
        case 2:printf("Analysis:");
                news();
                break;
        case 3:printf("Printing result:");
                printingresult();
                break;
        default: printf("Wrong Choice\n");
                goto retry;
    }
    return 0;

}
void printingresult()
{
     printf("\nstd.no        name       cpl        phy       mat       egp             tsm           total           per\n");
     i=0;
        do
    {
        printf("%d\t%s\t%s\t%d\t%d\t%d\t%d\t%d\t%d\t\t%f\n",student[i].sn,student[i].fn,student[i].ln,student[i].cpl,student[i].phy,student[i].mat,student[i].egp,student[i].tsm,student[i].t,student[i].per);
                i++;
    }while(i&lt3);
}
void topper()
{
    register double max;
    for(i =student1;i&lt=student3;i++)
    {
        if(max>student[i].per)
        {
            continue;
        }
        else
        {
                 max = student[i].per;
        }
    }
    printf("%4f",max);
}
void news()
{
    T.Lyear=2020;
    printf("Result in year: %d",T.Lyear);
    printf("\nGrade last year: %f",grade);
    T.Tyear=2021;
    printf("\nResult this year %d",T.Tyear);
    grade = student[0].per+student[1].per+student[2].per;
    printf("\nOverall Grade:%f",(grade/3));

}

output

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Structure in C-1

Question: Write a program in C using struct for displaying results in order for 3 students.The program used include name,marks in 6 subjects,total and average. it should print result in table form

#include <stdio.h>
#include <stdlib.h>
struct
{
    char fn[12],ln[8];
    int sn,cpl,che,mat,egp,phy,acs,t;
    float per;
}student[2];
int main()
{
    int i=0,tmp,j=0;
    for(i=0;i<3;i++)
    {
        printf("Enter student %d first name:",i+1);
        scanf("%s",student[i].fn);
        printf("Enter student %d second name:",i+1);
        scanf("%s",student[i].ln);
        printf("Enter student number:");
        scanf("%d",&student[i].sn);
        printf("Enter CPL101 marks:");
        scanf("%d",&student[i].cpl);
        printf("Enter CHE101 marks:");
        scanf("%d",&student[i].che);
        printf("Enter MAT101 marks:");
        scanf("%d",&student[i].mat);
        printf("Enter EGP101 marks:");
        scanf("%d",&student[i].egp);
        printf("Enter PHY101 marks:");
        scanf("%d",&student[i].phy);
        printf("Enter ACS101 marks :");
        scanf("%d",&student[i].acs);
        student[i].t = student[i].acs+student[i].phy+student[i].mat+student[i].che+student[i].egp+student[i].cpl;
        student[i].per=student[i].t/6;
    }
       for(i=0; i<3; i++)
    {
        for(j=i+1; j<=3; j++)
        {
            if(student[i].per <student[j].per)
            {
                tmp = student[i].per;
                student[i].per = student[j].per;
               student[j].per = tmp;
            }
        }
    }
    printf("\nstd.no        name       cpl        che        mat       egp       phy        acs           total           per\n");
        for(i=0; i<3; i++)
    {
        printf("%d\t%s\t%s\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%f\n",student[i].sn,student[i].fn,student[i].ln,student[i].cpl,student[i].che,student[i].mat,student[i].egp,student[i].phy,student[i].acs,student[i].t,student[i].per);


    }
}

Output

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Print Hello World! without semicolon

 Printing Helloworld!

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