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- //grade system program.
- #include<stdio.h>
- int main()
- {
- int mark;
- printf("Enter your mark : ");
- scanf("%d",&mark);
- if(mark>=0)
- if(mark>=40)
- if(mark>=45)
- if(mark>=50)
- if(mark>=55)
- if(mark>=60)
- if(mark>=65)
- if(mark>=70)
- if(mark>=75)
- if(mark>=80)
- if(mark<=100)
- if(mark>100)
- printf("Invalid Marks.please retype your marks.");
- else
- printf("A+");
- else
- printf("A+");
- else
- printf("A");
- else
- printf("A-");
- else
- printf("B+");
- else
- printf("B");
- else
- printf("B-");
- else
- printf("C+");
- else
- printf("C");
- else
- printf("D");
- else
- printf("FAIL");
- return 0;
- }
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