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https://github.com/TheAlgorithms/C
synced 2024-11-22 13:31:21 +03:00
41 lines
655 B
C
41 lines
655 B
C
#include<stdio.h>
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#include<math.h>
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float f(float x)
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{
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return 1.0+x*x*x; //This is the expresion of the function to integrate?
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}
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void main()
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{
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int i,n;
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float a,b,h,x,s2,s3,sum,integral;
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printf("enter the lower limit of the integration:");
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scanf("%f",&a);
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printf("enter the upper limit of the integration:");
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scanf("%f",&b);
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printf("enter the number of intervals:");
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scanf("%d",&n);
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h=(b-a)/n;
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sum=f(a)+f(b);
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s2=s3=0.0;
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for(i=1;i<n;i+=3)
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{
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x=a+i*h;
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s3=s3+f(x)+f(x+h);
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}
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for(i=3;i<n;i+=3)
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{
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x=a+i*h;
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s2=s2+f(x);
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}
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integral=(h/3.0)*(sum+2*s2+4*s3);
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printf("\nValue of the integral = %9.4f\n",integral);
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return 0;
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} |