The C++ Programming Language Special Edition   Definite integration This C program involves dividing the area under a given curve into very narrow bars. The area of each bar is calculated, and areas are summed together. the total sum of all the areas between the 2 boundary limits is the value of integration. Here is the source code: #include <stdio.h> /* Propram to perform definite integration of a given function between two boundary limits input by user. Feel free to use and modify it, but please do not remove this comment. source: C for Engineering, https://c4engineering.hypermart.net */ #define N 1000 void main(void) { float i, a, b, sum = 0; printf("\nThis program will integrate a function between two boundary limits."); printf("\n\nEnter the first boundary limit:"); scanf("%f", &a); printf("\nEnter the second boundary limit:"); scanf("%f", &b); if(a > b) { i = a; a = b; b = i; } for(i = a; i < b; i += (b - a) / N) { /* Define your function below, and include the suitable header files */ y = x * x + 2 * x - 4; sum += y * (b - a) / N; } printf("\n\nValue of integration is:%.3f", sum); getch(); return; } You can select and copy the above source code, paste it to your C compiler, and use it as you like. You can also download it in a text file, just click here.

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