[C language programming] Write a program, define and call functions int sum(int (*fp)(int), int start,intend) and int f(intx), the function of function f0 is to find the square of x; input from the keyboard two integers.

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Topics and requirements

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code example

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Topics and requirements

Write a program, define and call functions int sum(int (*fp)(int), int start,intend) and int f(intx), the function of function f0 is to find the square of x; input two integers from the keyboard and store them in The variables numl and num2 require numlsnmm2: call the function sum(fnum1.num2) to obtain the value of [(num])+..+f(num2).

 Knowledge points involved

[C language programming] Pointer

【Compilation software】Visual Studio

code example

#include <stdio.h>
int f(int);
int sum(int (*fp)(int), int, int);
int main(void) {
    int num1, num2;
    scanf_s("%d%d", &num1, &num2);                //        Dev c++ 要把scanf_s去掉_s
    int result = sum(f, num1, num2);
    printf("%d\n", result);
    return 0;
}

int sum(int (*fp)(int), int start, int end) {
    int sum = 0;
    int i;
    for (i = start; i <= end; i++) {
        sum += fp(i);
    }
    return sum;
}
int f(int x) {
    return x * x;
}

#include <stdio.h>
int f(int);
int sum(int (*fp)(int), int, int);
int main(void) {
    int num1, num2;
    scanf_s("%d%d", &num1, &num2);
    int result = sum(f, num1, num2);
    printf("%d\n", result);
    return 0;
}

int sum(int (*fp)(int), int start, int end) {
    int sum = 0;
    int i;
    for (i = start; i <= end; i++) {
        sum += fp(i);
    }
    return sum;
}
int f(int x) {
    return x * x;
}

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