scanf doubt

[abhi17]

float f;
scanf("%d",&f);
scanf("%f",&f);


first use of scanf is wrong but why didnt the second one work?? howdoes one wrong scanf affects all other later uses of scanf

[Banfa]

In what way did the second one not work?

[donbock]

float f;
scanf("%d",&f);
scanf("%f",&f);

first use of scanf is wrong but why didnt the second one work?? how does one wrong scanf affects all other later uses of scanf

In your first call to scanf you directed the function to overwrite a float variable with an int value. If sizeof(int) > sizeof(float) on your compiler then this action corrupted your program and you can't expect anything to work properly after that. On the other hand, I'm not aware of any compilers where sizeof(float) is less than sizeof(int).

[donbock]

float f;
scanf("%d",&f);
scanf("%f",&f);

first use of scanf is wrong but why didnt the second one work?? how does one wrong scanf affects all other later uses of scanf

Your first call to scanf you directed the function to overwrite a float variable with an int value. If sizeof(int) > sizeof(float) on your compiler then this action corrupted your program and you can't expect anything to work properly after that. On the other hand, I'm not aware of any compilers where sizeof(float) is less than sizeof(int); but that doesn't mean it can't happen.