something wrong in my program, please help me. how to prevent other statements from following, if score>77

Question

#include <stdio.h>

int main()

    {

    float uts,uas,assignment,attendance,score;

    printf("enter student grades\n");

    printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");

    printf("Enter UTS grades: ");

    scanf("%f",&uts);

    printf(Enter UAS grades": ");

    scanf("%f",&uas);

    printf("enter assignment value: ");

    scanf("%f",& assignment);

    printf("Enter attendance: ");

    scanf("%f",&attendance);

    

    score=(0.3*uts)+(0.35*uas)+(0.3*assignment) + (0.05*(attendance/14));

    

    if (score>77) {printf("YOUR LETTERS VALUES ARE: A\n");

    }if (score>70) {printf("YOUR LETTERS VALUES ARE: AB\n");

    }if (score>63) {printf("YOUR LETTERS VALUES ARE: B\n");

    }if (score>55) {printf("YOUR LETTERS VALUES ARE: BC\n");

    }if (score>45) {printf("YOUR LETTERS VALUES ARE: C\n");

    }if (score>25) {printf("YOUR LETTERS VALUES ARE: D\n");

    }if (score<25) {printf("YOUR LETTERS VALUES ARE: E\n");

    }

return 0;

}

RESULT:

enter student grades

Enter UTS grades: 90

Enter UAS grades: 90

Enter assignment grades: 90

enter attendance: 14

YOUR LETTERS VALUES ARE: A

YOUR LETTERS VALUES ARE: AB

YOUR LETTERS VALUES ARE: B

YOUR LETTERS VALUES ARE: BC

YOUR LETTERS VALUES ARE: C

YOUR LETTERS VALUES ARE: D

the statement i mean is the "YOUR LATTERS VALUES IS"

Answer 1

The syntax of if is as below (with the else [statement] being optional)

if ([condition])
    [statement]
else
    [statement]

Now using this, your could should look like this:

#include <stdio.h>

int main()
{
    float uts, uas, assignment, attendance;
    printf("Enter student grades\n");
    printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    printf("Enter UTS grades: ");
    scanf("%f", &uts);
    printf("Enter UAS grades: ");
    scanf("%f", &uas);
    printf("Enter assignment value: ");
    scanf("%f", &assignment);
    printf("Enter attendance: ");
    scanf("%f", &attendance);

    float score = (0.3f * uts) + (0.35f * uas) + (0.3f * assignment) + (0.05f * (attendance / 14));

    if (score > 77.0f)
    {
        printf("YOUR LETTERS VALUES ARE: A\n");
    }
    else if (score > 70.0f)
    {
        printf("YOUR LETTERS VALUES ARE: AB\n");
    }
    else if (score > 63.0f)
    {
        printf("YOUR LETTERS VALUES ARE: B\n");
    }
    else if (score > 55.0f)
    {
        printf("YOUR LETTERS VALUES ARE: BC\n");
    }
    else if (score > 45.0f)
    {
        printf("YOUR LETTERS VALUES ARE: C\n");
    }
    else if (score > 25.0f)
    {
        printf("YOUR LETTERS VALUES ARE: D\n");
    }
    else
    {
        printf("YOUR LETTERS VALUES ARE: E\n");
    }
    
    return 0;
}

Notes:

1. I applied a bit of formatting
2. I added the f suffix after the number literals to distinguish a float from a double type.
3. Your original code was wrong because it didn't handle score == 25 case. The above code handles that case correctly.
4. printf(Enter UAS grades": "); line had the quotes in the wrong locations. I fixed it in the code.

Comments

thanks bro for helping to solve my problem.

Answer 2

#include <stdio.h>

int main()

{

    float uts,uas,assignment,attendance,score;

    printf("enter student grades\n");

    printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");

    printf("Enter UTS grades: ");

    scanf("%f",&uts);

    printf("Enter UAS grades: ");

    scanf("%f",&uas);

    printf("enter assignment value: ");

    scanf("%f",&assignment);

    printf("Enter attendance: ");

    scanf("%f",&attendance);

    

    score=(0.3*uts)+(0.35*uas)+(0.3*assignment) + (0.05*(attendance/14));

    

    if (score>77)
    {
        printf("YOUR LETTERS VALUES ARE: A\n");

    }
    else if (score>70)
    {
        printf("YOUR LETTERS VALUES ARE: AB\n");

    }
    else if (score>63)
    {
        printf("YOUR LETTERS VALUES ARE: B\n");

    }
    else if (score>55)
    {
        printf("YOUR LETTERS VALUES ARE: BC\n");

    }
    else if (score>45)
    {
        printf("YOUR LETTERS VALUES ARE: C\n");

    }
    else if (score>25)
    {
        printf("YOUR LETTERS VALUES ARE: D\n");

    }
    else if (score<25)
    {
        printf("YOUR LETTERS VALUES ARE: E\n");

    }

return 0;

}

RESULT:

enter student grades
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter UTS grades: 99
Enter UAS grades: 99
enter assignment value: 99
Enter attendance: 99
YOUR LETTERS VALUES ARE: A

?? just use else if if you have multiple options or switch case. it will be much more easier