1 September 2011 4:26:02.361 PM QUAD_MAIN: FORTRAN90/C/MPI version An example program to estimate an integral. In this example, we have a FORTRAN90 main program, and an underlying C function, which must cooperate. Moreover, the main program invokes the MPI library, and the C function must execute within that environment. This means that the C function must receive the value of MPI_COMM_WORLD from the FORTRAN program. The number of processes is 1 Process 0 is active. QUAD_MAIN: Integral estimate 3.141592736923123 Exact value is 3.141592653589793 Error is 0.8333332957022321E-07 Elapsed wall clock seconds = 0.588894E-04 QUAD_MAIN: Normal end of execution. 1 September 2011 4:26:02.418 PM QUAD_COMPUTE - Process 0: Points used = 1000 Estimate 3.141593.